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Add major new example
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Ian Gray
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examples/completeExample/completeExample.cpp
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502
examples/completeExample/completeExample.cpp
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/**
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* @file completeExample.cpp
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* @author Ian Gray @iangray1000
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*
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* This is an example GUI to show off all of the features of ESPUI.
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* This can be built using the Arduino IDE, or Platform IO.
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*
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* ---------------------------------------------------------------------------------------
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* If you just want to see examples of the ESPUI code, jump down to the setUpUI() function
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* ---------------------------------------------------------------------------------------
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*
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* When this program boots, it will load an SSID and password from the EEPROM.
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* The SSID is a null-terminated C string stored at EEPROM addresses 0-31
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* The password is a null-terminated C string stored at EEPROM addresses 32-95.
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* If these credentials do not work for some reason, the ESP will create an Access
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* Point wifi with the SSID HOSTNAME (defined below). You can then connect and use
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* the controls on the "Wifi Credentials" tab to store credentials into the EEPROM.
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*
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*/
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#include <Arduino.h>
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#include <EEPROM.h>
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#include <ESPUI.h>
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#if defined(ESP32)
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#include <WiFi.h>
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#include <ESPmDNS.h>
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#else
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#include <ESP8266WiFi.h>
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#include <ESP8266mDNS.h>
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#endif
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//Settings
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#define SLOW_BOOT 0
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#define HOSTNAME "ESPUITest"
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#define FORCE_USE_HOTSPOT 0
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//Function Prototypes
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void connectWifi();
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void setUpUI();
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void enterWifiDetailsCallback(Control *sender, int type);
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void textCallback(Control *sender, int type);
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void generalCallback(Control *sender, int type);
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void scrambleCallback(Control *sender, int type);
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void styleCallback(Control *sender, int type);
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void updateCallback(Control *sender, int type);
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void getTimeCallback(Control *sender, int type);
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void graphAddCallback(Control *sender, int type);
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void graphClearCallback(Control *sender, int type);
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void randomString(char *buf, int len);
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//UI handles
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uint16_t wifi_ssid_text, wifi_pass_text;
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uint16_t mainLabel, mainSwitcher, mainSlider, mainText, mainNumber, mainScrambleButton, mainTime;
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uint16_t styleButton, styleLabel, styleSwitcher, styleSlider, styleButton2, styleLabel2, styleSlider2;
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uint16_t graph;
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volatile bool updates = false;
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void setup() {
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randomSeed(0);
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Serial.begin(115200);
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while(!Serial);
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if(SLOW_BOOT) delay(5000); //Delay booting to give time to connect a serial monitor
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connectWifi();
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#if defined(ESP32)
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WiFi.setSleep(false); //For the ESP32: turn off sleeping to increase UI responsivness (at the cost of power use)
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#endif
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setUpUI();
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}
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void loop() {
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static long unsigned lastTime = 0;
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//Send periodic updates if switcher is turned on
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if(updates && millis() > lastTime + 500) {
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static uint16_t sliderVal = 10;
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//Flick this switcher on and off
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ESPUI.updateSwitcher(mainSwitcher, ESPUI.getControl(mainSwitcher)->value.toInt() ? false : true);
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sliderVal += 10;
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if(sliderVal > 400) sliderVal = 10;
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//Sliders, numbers, and labels can all be updated at will
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ESPUI.updateSlider(mainSlider, sliderVal);
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ESPUI.updateNumber(mainNumber, random(100000));
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ESPUI.updateLabel(mainLabel, String(sliderVal));
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lastTime = millis();
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}
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//Simple debug UART interface
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if(Serial.available()) {
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switch(Serial.read()) {
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case 'w': //Print IP details
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Serial.println(WiFi.localIP());
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break;
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case 'W': //Reconnect wifi
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connectWifi();
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break;
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case 'C': //Force a crash (for testing exception decoder)
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#if !defined(ESP32)
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((void (*)())0xf00fdead)();
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#endif
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default:
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Serial.print('#');
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break;
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}
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}
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#if !defined(ESP32)
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//We don't need to call this explicitly on ESP32 but we do on 8266
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MDNS.update();
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#endif
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}
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// This is the main function which builds our GUI
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void setUpUI() {
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//Turn off verbose debugging
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ESPUI.setVerbosity(Verbosity::Quiet);
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//Make sliders continually report their position as they are being dragged.
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ESPUI.sliderContinuous = true;
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//This GUI is going to be a tabbed GUI, so we are adding most controls using ESPUI.addControl
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//which allows us to set a parent control. If we didn't need tabs we could use the simpler add
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//functions like:
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// ESPUI.button()
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// ESPUI.label()
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/*
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* Tab: Basic Controls
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* This tab contains all the basic ESPUI controls, and shows how to read and update them at runtime.
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*-----------------------------------------------------------------------------------------------------------*/
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auto maintab = ESPUI.addControl(Tab, "", "Basic controls");
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ESPUI.addControl(Separator, "General controls", "", None, maintab);
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ESPUI.addControl(Button, "Button", "Button 1", Alizarin, maintab, generalCallback);
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mainLabel = ESPUI.addControl(Label, "Label", "Label text", Emerald, maintab, generalCallback);
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mainSwitcher = ESPUI.addControl(Switcher, "Switcher", "", Sunflower, maintab, generalCallback);
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//Sliders default to being 0 to 100, but if you want different limits you can add a Min and Max control
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mainSlider = ESPUI.addControl(Slider, "Slider", "200", Turquoise, maintab, generalCallback);
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ESPUI.addControl(Min, "", "10", None, mainSlider);
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ESPUI.addControl(Max, "", "400", None, mainSlider);
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//These are the values for the selector's options. (Note that they *must* be declared static
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//so that the storage is allocated in global memory and not just on the stack of this function.)
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static String optionValues[] {"Value 1", "Value 2", "Value 3", "Value 4", "Value 5"};
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auto mainselector = ESPUI.addControl(Select, "Selector", "Selector", Wetasphalt, maintab, generalCallback);
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for(auto const& v : optionValues) {
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ESPUI.addControl(Option, v.c_str(), v, None, mainselector);
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}
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mainText = ESPUI.addControl(Text, "Text Input", "Initial value", Alizarin, maintab, generalCallback);
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//Number inputs also accept Min and Max components, but you should still validate the values.
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mainNumber = ESPUI.addControl(Number, "Number Input", "42", Emerald, maintab, generalCallback);
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ESPUI.addControl(Min, "", "10", None, mainNumber);
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ESPUI.addControl(Max, "", "50", None, mainNumber);
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ESPUI.addControl(Separator, "Updates", "", None, maintab);
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//This button will update all the updatable controls on this tab to random values
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mainScrambleButton = ESPUI.addControl(Button, "Scramble Values", "Scramble Values", Carrot, maintab, scrambleCallback);
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ESPUI.addControl(Switcher, "Constant updates", "0", Carrot, maintab, updateCallback);
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mainTime = ESPUI.addControl(Time, "", "", None, 0, generalCallback);
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ESPUI.addControl(Button, "Get Time", "Get Time", Carrot, maintab, getTimeCallback);
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ESPUI.addControl(Separator, "Control Pads", "", None, maintab);
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ESPUI.addControl(Pad, "Normal", "", Peterriver, maintab, generalCallback);
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ESPUI.addControl(PadWithCenter, "With center", "", Peterriver, maintab, generalCallback);
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/*
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* Tab: Colours
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* This tab shows all the basic colours
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*-----------------------------------------------------------------------------------------------------------*/
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auto colourtab = ESPUI.addControl(Tab, "", "Colours");
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ESPUI.addControl(Button, "Alizarin", "Alizarin", Alizarin, colourtab, generalCallback);
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ESPUI.addControl(Button, "Turquoise", "Turquoise", Turquoise, colourtab, generalCallback);
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ESPUI.addControl(Button, "Emerald", "Emerald", Emerald, colourtab, generalCallback);
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ESPUI.addControl(Button, "Peterriver", "Peterriver", Peterriver, colourtab, generalCallback);
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ESPUI.addControl(Button, "Wetasphalt", "Wetasphalt", Wetasphalt, colourtab, generalCallback);
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ESPUI.addControl(Button, "Sunflower", "Sunflower", Sunflower, colourtab, generalCallback);
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ESPUI.addControl(Button, "Carrot", "Carrot", Carrot, colourtab, generalCallback);
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ESPUI.addControl(Button, "Dark", "Dark", Dark, colourtab, generalCallback);
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/*
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* Tab: Styled controls
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* This tab shows off how inline CSS styles can be applied to elements and panels in order
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* to customise the look of the UI.
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*-----------------------------------------------------------------------------------------------------------*/
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auto styletab = ESPUI.addControl(Tab, "", "Styled controls");
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styleButton = ESPUI.addControl(Button, "Styled Button", "Button", Alizarin, styletab, generalCallback);
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styleLabel = ESPUI.addControl(Label, "Styled Label", "This is a label", Alizarin, styletab, generalCallback);
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styleSwitcher = ESPUI.addControl(Switcher, "Styled Switcher", "1", Alizarin, styletab, generalCallback);
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styleSlider = ESPUI.addControl(Slider, "Styled Slider", "0", Alizarin, styletab, generalCallback);
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//This button will randomise the colours of the above controls to show updating of inline styles
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ESPUI.addControl(Button, "Randomise Colours", "Randomise Colours", Sunflower, styletab, styleCallback);
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ESPUI.addControl(Separator, "Other styling examples", "", None, styletab);
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styleButton2 = ESPUI.addControl(Button, "Styled Button", "Button", Alizarin, styletab, generalCallback);
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ESPUI.setPanelStyle(styleButton2, "background: linear-gradient(90deg, rgba(131,58,180,1) 0%, rgba(253,29,29,1) 50%, rgba(252,176,69,1) 100%); border-bottom: #555;");
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ESPUI.setElementStyle(styleButton2, "border-radius: 2em; border: 3px solid black; width: 30%; background-color: #8df;");
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styleSlider2 = ESPUI.addControl(Slider, "Styled Slider", "0", Dark, styletab, generalCallback);
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ESPUI.setElementStyle(styleSlider2, "background: linear-gradient(to right, red, orange, yellow, green, blue);");
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styleLabel2 = ESPUI.addControl(Label, "Styled Label", "This is a label", Dark, styletab, generalCallback);
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ESPUI.setElementStyle(styleLabel2, "text-shadow: 3px 3px #74b1ff, 6px 6px #c64ad7; font-size: 60px; font-variant-caps: small-caps; background-color: unset; color: #c4f0bb; -webkit-text-stroke: 1px black;");
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/*
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* Tab: Grouped controls
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* This tab shows how multiple control can be grouped into the same panel through the use of the
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* parentControl value.
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*-----------------------------------------------------------------------------------------------------------*/
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auto grouptab = ESPUI.addControl(Tab, "", "Grouped controls");
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//The parent of this button is a tab, so it will create a new panel with one control.
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auto groupbutton = ESPUI.addControl(Button, "Button Group", "Button A", Dark, grouptab, generalCallback);
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//However the parent of this button is another control, so therefore no new panel is
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//created and the button is added to the existing panel.
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ESPUI.addControl(Button, "", "Button B", Alizarin, groupbutton, generalCallback);
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ESPUI.addControl(Button, "", "Button C", Alizarin, groupbutton, generalCallback);
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//Sliders can be grouped as well
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String clearLabelStyle = "background-color: unset; width: 100%;";
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auto groupsliders = ESPUI.addControl(Slider, "Slider Group", "10", Dark, grouptab, generalCallback);
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ESPUI.setElementStyle(ESPUI.addControl(Label, "", "A", None, groupsliders), clearLabelStyle);
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ESPUI.addControl(Slider, "", "20", None, groupsliders, generalCallback);
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ESPUI.setElementStyle(ESPUI.addControl(Label, "", "B", None, groupsliders), clearLabelStyle);
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ESPUI.addControl(Slider, "", "30", None, groupsliders, generalCallback);
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ESPUI.setElementStyle(ESPUI.addControl(Label, "", "C", None, groupsliders), clearLabelStyle);
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//We can put 4 switchers next to each other, but as they lack labels it can be hard to see
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//which is which. We can add labels to them with some label controls and styling.
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auto groupswitcher = ESPUI.addControl(Switcher, "Switcher Group", "0", Dark, grouptab, generalCallback);
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ESPUI.addControl(Switcher, "", "1", Sunflower, groupswitcher, generalCallback);
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ESPUI.addControl(Switcher, "", "0", Sunflower, groupswitcher, generalCallback);
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ESPUI.addControl(Switcher, "", "1", Sunflower, groupswitcher, generalCallback);
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//This label does nothing apart from put the next 4 onto the next line
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ESPUI.setElementStyle(ESPUI.addControl(Label, "", "", None, groupswitcher), clearLabelStyle);
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//They are set to the same width as a switcher so appear below them
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String labelStyle = "width: 60px; margin-left: .3rem; margin-right: .3rem; background-color: unset;";
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ESPUI.setElementStyle(ESPUI.addControl(Label, "", "A", None, groupswitcher), labelStyle);
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ESPUI.setElementStyle(ESPUI.addControl(Label, "", "B", None, groupswitcher), labelStyle);
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ESPUI.setElementStyle(ESPUI.addControl(Label, "", "C", None, groupswitcher), labelStyle);
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ESPUI.setElementStyle(ESPUI.addControl(Label, "", "D", None, groupswitcher), labelStyle);
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//You can mix and match different control types, but the results might sometimes
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//need additional styling to lay out nicely.
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auto grouplabel = ESPUI.addControl(Label, "Mixed Group", "Main label", Dark, grouptab);
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auto grouplabel2 = ESPUI.addControl(Label, "", "Secondary label", Emerald, grouplabel);
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ESPUI.addControl(Button, "", "Button D", Alizarin, grouplabel, generalCallback);
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ESPUI.addControl(Switcher, "", "1", Sunflower, grouplabel, generalCallback);
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ESPUI.setElementStyle(grouplabel2, "font-size: x-large; font-family: serif;");
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//Some controls can even support vertical orientation, currently Switchers and Sliders
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ESPUI.addControl(Separator, "Vertical controls", "", None, grouptab);
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auto vertgroupswitcher = ESPUI.addControl(Switcher, "Vertical Switcher Group", "0", Dark, grouptab, generalCallback);
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ESPUI.setVertical(vertgroupswitcher);
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//On the following lines we wrap the value returned from addControl and send it straight to setVertical
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ESPUI.setVertical(ESPUI.addControl(Switcher, "", "0", None, vertgroupswitcher, generalCallback));
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ESPUI.setVertical(ESPUI.addControl(Switcher, "", "0", None, vertgroupswitcher, generalCallback));
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ESPUI.setVertical(ESPUI.addControl(Switcher, "", "0", None, vertgroupswitcher, generalCallback));
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auto vertgroupslider = ESPUI.addControl(Slider, "Vertical Slider Group", "15", Dark, grouptab, generalCallback);
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ESPUI.setVertical(vertgroupslider);
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ESPUI.setVertical(ESPUI.addControl(Slider, "", "25", None, vertgroupslider, generalCallback));
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ESPUI.setVertical(ESPUI.addControl(Slider, "", "35", None, vertgroupslider, generalCallback));
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ESPUI.setVertical(ESPUI.addControl(Slider, "", "45", None, vertgroupslider, generalCallback));
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//Note that combining vertical and horizontal sliders is going to result in very messy layout!
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/*
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* Tab: Example UI
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* An example UI for the documentation
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*-----------------------------------------------------------------------------------------------------------*/
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auto exampletab = ESPUI.addControl(Tab, "Example", "Example");
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ESPUI.addControl(Separator, "Control and Status", "", None, exampletab);
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ESPUI.addControl(Switcher, "Power", "1", Alizarin, exampletab, generalCallback);
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ESPUI.addControl(Label, "Status", "System status: OK", Wetasphalt, exampletab, generalCallback);
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ESPUI.addControl(Separator, "Settings", "", None, exampletab);
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ESPUI.addControl(PadWithCenter, "Attitude Control", "", Dark, exampletab, generalCallback);
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auto examplegroup1 = ESPUI.addControl(Button, "Activate Features", "Feature A", Carrot, exampletab, generalCallback);
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ESPUI.addControl(Button, "Activate Features", "Feature B", Carrot, examplegroup1, generalCallback);
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ESPUI.addControl(Button, "Activate Features", "Feature C", Carrot, examplegroup1, generalCallback);
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ESPUI.addControl(Slider, "Value control", "45", Peterriver, exampletab, generalCallback);
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/*
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* Tab: WiFi Credentials
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* You use this tab to enter the SSID and password of a wifi network to autoconnect to.
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*-----------------------------------------------------------------------------------------------------------*/
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auto wifitab = ESPUI.addControl(Tab, "", "WiFi Credentials");
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wifi_ssid_text = ESPUI.addControl(Text, "SSID", "", Alizarin, wifitab, textCallback);
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//Note that adding a "Max" control to a text control sets the max length
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ESPUI.addControl(Max, "", "32", None, wifi_ssid_text);
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wifi_pass_text = ESPUI.addControl(Text, "Password", "", Alizarin, wifitab, textCallback);
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ESPUI.addControl(Max, "", "64", None, wifi_pass_text);
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ESPUI.addControl(Button, "Save", "Save", Peterriver, wifitab, enterWifiDetailsCallback);
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//Finally, start up the UI.
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//This should only be called once we are connected to WiFi.
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ESPUI.begin(HOSTNAME);
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}
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//This callback generates and applies inline styles to a bunch of controls to change their colour.
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//The styles created are of the form:
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// "border-bottom: #999 3px solid; background-color: #aabbcc;"
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// "background-color: #aabbcc;"
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void styleCallback(Control *sender, int type) {
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//Declare space for style strings. These have to be static so that they are always available
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//to the websocket layer. If we'd not made them static they'd be allocated on the heap and
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//will be unavailable when we leave this function.
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static char stylecol1[60], stylecol2[30];
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if(type == B_UP) {
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//Generate two random HTML hex colour codes, and print them into CSS style rules
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sprintf(stylecol1, "border-bottom: #999 3px solid; background-color: #%06X;", (unsigned int) random(0x0, 0xFFFFFF));
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sprintf(stylecol2, "background-color: #%06X;", (unsigned int) random(0x0, 0xFFFFFF));
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//Apply those styles to various elements to show how controls react to styling
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ESPUI.setPanelStyle(styleButton, stylecol1);
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ESPUI.setElementStyle(styleButton, stylecol2);
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ESPUI.setPanelStyle(styleLabel, stylecol1);
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ESPUI.setElementStyle(styleLabel, stylecol2);
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ESPUI.setPanelStyle(styleSwitcher, stylecol1);
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ESPUI.setElementStyle(styleSwitcher, stylecol2);
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ESPUI.setPanelStyle(styleSlider, stylecol1);
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ESPUI.setElementStyle(styleSlider, stylecol2);
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}
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}
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//This callback updates the "values" of a bunch of controls
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void scrambleCallback(Control *sender, int type) {
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static char rndString1[10];
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static char rndString2[20];
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static bool scText = false;
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if(type == B_UP) { //Button callbacks generate events for both UP and DOWN.
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//Generate some random text
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randomString(rndString1, 10);
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randomString(rndString2, 20);
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//Set the various controls to random value to show how controls can be updated at runtime
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ESPUI.updateLabel(mainLabel, String(rndString1));
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ESPUI.updateSwitcher(mainSwitcher, ESPUI.getControl(mainSwitcher)->value.toInt() ? false : true);
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||||
ESPUI.updateSlider(mainSlider, random(10, 400));
|
||||
ESPUI.updateText(mainText, String(rndString2));
|
||||
ESPUI.updateNumber(mainNumber, random(100000));
|
||||
ESPUI.updateButton(mainScrambleButton, scText ? "Scrambled!" : "Scrambled.");
|
||||
scText = !scText;
|
||||
}
|
||||
}
|
||||
|
||||
void updateCallback(Control *sender, int type) {
|
||||
updates = (sender->value.toInt() > 0);
|
||||
}
|
||||
|
||||
void getTimeCallback(Control *sender, int type) {
|
||||
if(type == B_UP) {
|
||||
ESPUI.updateTime(mainTime);
|
||||
}
|
||||
}
|
||||
|
||||
void graphAddCallback(Control *sender, int type) {
|
||||
if(type == B_UP) {
|
||||
ESPUI.addGraphPoint(graph, random(1, 50));
|
||||
}
|
||||
}
|
||||
|
||||
void graphClearCallback(Control *sender, int type) {
|
||||
if(type == B_UP) {
|
||||
ESPUI.clearGraph(graph);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
//Most elements in this test UI are assigned this generic callback which prints some
|
||||
//basic information. Event types are defined in ESPUI.h
|
||||
void generalCallback(Control *sender, int type) {
|
||||
Serial.print("CB: id(");
|
||||
Serial.print(sender->id);
|
||||
Serial.print(") Type(");
|
||||
Serial.print(type);
|
||||
Serial.print(") '");
|
||||
Serial.print(sender->label);
|
||||
Serial.print("' = ");
|
||||
Serial.println(sender->value);
|
||||
}
|
||||
|
||||
|
||||
//Utilities
|
||||
//
|
||||
//If you are here just to see examples of how to use ESPUI, you can ignore the following functions
|
||||
//------------------------------------------------------------------------------------------------
|
||||
void readStringFromEEPROM(String& buf, int baseaddress, int size) {
|
||||
buf.reserve(size);
|
||||
for (int i = baseaddress; i < baseaddress+size; i++) {
|
||||
char c = EEPROM.read(i);
|
||||
buf += c;
|
||||
if(!c) break;
|
||||
}
|
||||
}
|
||||
|
||||
void connectWifi() {
|
||||
int connect_timeout;
|
||||
|
||||
#if defined(ESP32)
|
||||
WiFi.setHostname(HOSTNAME);
|
||||
#else
|
||||
WiFi.hostname(HOSTNAME);
|
||||
#endif
|
||||
Serial.println("Begin wifi...");
|
||||
|
||||
//Load credentials from EEPROM
|
||||
if(!(FORCE_USE_HOTSPOT)) {
|
||||
yield();
|
||||
EEPROM.begin(100);
|
||||
String stored_ssid, stored_pass;
|
||||
readStringFromEEPROM(stored_ssid, 0, 32);
|
||||
readStringFromEEPROM(stored_pass, 32, 96);
|
||||
EEPROM.end();
|
||||
|
||||
//Try to connect with stored credentials, fire up an access point if they don't work.
|
||||
#if defined(ESP32)
|
||||
WiFi.begin(stored_ssid.c_str(), stored_pass.c_str());
|
||||
#else
|
||||
WiFi.begin(stored_ssid, stored_pass);
|
||||
#endif
|
||||
connect_timeout = 28; //7 seconds
|
||||
while (WiFi.status() != WL_CONNECTED && connect_timeout > 0) {
|
||||
delay(250);
|
||||
Serial.print(".");
|
||||
connect_timeout--;
|
||||
}
|
||||
}
|
||||
|
||||
if (WiFi.status() == WL_CONNECTED) {
|
||||
Serial.println(WiFi.localIP());
|
||||
Serial.println("Wifi started");
|
||||
|
||||
if (!MDNS.begin(HOSTNAME)) {
|
||||
Serial.println("Error setting up MDNS responder!");
|
||||
}
|
||||
} else {
|
||||
Serial.println("\nCreating access point...");
|
||||
WiFi.mode(WIFI_AP);
|
||||
WiFi.softAPConfig(IPAddress(192, 168, 1, 1), IPAddress(192, 168, 1, 1), IPAddress(255, 255, 255, 0));
|
||||
WiFi.softAP(HOSTNAME);
|
||||
|
||||
connect_timeout = 20;
|
||||
do {
|
||||
delay(250);
|
||||
Serial.print(",");
|
||||
connect_timeout--;
|
||||
} while(connect_timeout);
|
||||
}
|
||||
}
|
||||
|
||||
void enterWifiDetailsCallback(Control *sender, int type) {
|
||||
if(type == B_UP) {
|
||||
Serial.println("Saving credentials to EPROM...");
|
||||
Serial.println(ESPUI.getControl(wifi_ssid_text)->value);
|
||||
Serial.println(ESPUI.getControl(wifi_pass_text)->value);
|
||||
unsigned int i;
|
||||
EEPROM.begin(100);
|
||||
for(i = 0; i < ESPUI.getControl(wifi_ssid_text)->value.length(); i++) {
|
||||
EEPROM.write(i, ESPUI.getControl(wifi_ssid_text)->value.charAt(i));
|
||||
if(i==30) break; //Even though we provided a max length, user input should never be trusted
|
||||
}
|
||||
EEPROM.write(i, '\0');
|
||||
|
||||
for(i = 0; i < ESPUI.getControl(wifi_pass_text)->value.length(); i++) {
|
||||
EEPROM.write(i + 32, ESPUI.getControl(wifi_pass_text)->value.charAt(i));
|
||||
if(i==94) break; //Even though we provided a max length, user input should never be trusted
|
||||
}
|
||||
EEPROM.write(i + 32, '\0');
|
||||
EEPROM.end();
|
||||
}
|
||||
}
|
||||
|
||||
void textCallback(Control *sender, int type) {
|
||||
//This callback is needed to handle the changed values, even though it doesn't do anything itself.
|
||||
}
|
||||
|
||||
void randomString(char *buf, int len) {
|
||||
for(auto i = 0; i < len-1; i++)
|
||||
buf[i] = random(0, 26) + 'A';
|
||||
buf[len-1] = '\0';
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user