Config and OTA update via WiFi, support for PlatformIO, and minor bugfix

.gitignore

@@ -6,3 +6,6 @@ installer/firmware
 dist
 build
 firmware.zip
+bitcoinSwitch/config-*.h
+bitcoinSwitch/bitcoinSwitch.ino.cpp
+.github

bitcoinSwitch/100_config.cpp

@@ -0,0 +1,134 @@
+#include "100_config.h"
+
+String config_ssid;
+String config_password;
+String config_device_string;
+
+#ifdef HARDCODED
+void setupConfig()
+{
+  Serial.println("Setting hardcoded values...");
+  config_ssid = CONFIG_SSID;
+  Serial.println("SSID: " + config_ssid);
+  config_password = CONFIG_PASSWORD;
+  Serial.println("SSID password: " + config_password);
+  config_device_string = CONFIG_DEVICE_STRING;
+  Serial.println("Device string: " + config_device_string);
+
+  showWelcomeScreen();
+}
+#else
+void setupConfig()
+{
+  // first give the installer a chance to delete configuration file
+  executeConfigBoot();
+
+  showWelcomeScreen();
+
+  if (!readConfig())
+  {
+    // file does not exist, so we will enter endless config mode
+    Serial.println("Config file does not exist.");
+    executeSerialConfigForever();
+  }
+}
+
+bool readConfig()
+{
+  Preferences preferences;
+  preferences.begin(CONFIG_NAME, true);
+
+  if (!preferences.isKey("ssid"))
+  {
+    config_ssid = CONFIG_SSID;
+    config_password = CONFIG_PASSWORD;
+    config_device_string = CONFIG_DEVICE_STRING;
+
+    preferences.end();
+    return false;
+  }
+
+  config_ssid = preferences.getString("ssid", CONFIG_SSID);
+  config_password = preferences.getString("password", CONFIG_PASSWORD);
+  config_device_string = preferences.getString("device_string", CONFIG_DEVICE_STRING);
+
+  preferences.end();
+  return true;
+}
+
+void executeConfigBoot()
+{
+  Serial.println("Entering boot mode. Waiting for " + String(BOOTUP_TIMEOUT) + " seconds.");
+  clearTFT();
+  printTFT("BOOT MODE", 21, 21);
+
+  int counter = (BOOTUP_TIMEOUT + 1) * 10;
+  while (counter-- > 0)
+  {
+#ifdef TOUCH_PIN
+    int val = touchRead(TOUCH_PIN);
+    Serial.println("Touch read value: " + String(val));
+    if (val < 60)
+    {
+      Serial.println("Touch detected");
+      executePortalConfig();
+      return;
+    }
+#endif
+
+#ifdef BT1_PIN
+    pinMode(BT1_PIN, INPUT_PULLUP);
+    if (digitalRead(BT1_PIN) == LOW)
+    {
+      Serial.println("Button pressed");
+      executePortalConfig();
+      return;
+    }
+#endif
+
+    if (Serial.available() == 0)
+    {
+      delay(100);
+      continue;
+    }
+    Serial.println();
+    // if we get serial data in the first seconds, we will enter config mode
+    counter = 0;
+    executeSerialConfigForever();
+    return;
+  }
+
+  Serial.println("Exiting boot mode.");
+}
+
+void clearConfig()
+{
+  Preferences preferences;
+  preferences.begin(CONFIG_NAME, false);
+  preferences.clear();
+  preferences.end();
+
+  readConfig();
+}
+
+void saveConfig()
+{
+  Preferences preferences;
+  preferences.begin(CONFIG_NAME, false);
+
+  preferences.putString("ssid", config_ssid);
+  preferences.putString("password", config_password);
+  preferences.putString("device_string", config_device_string);
+
+  preferences.end();
+}
+#endif
+
+void showWelcomeScreen()
+{
+  Serial.print("Welcome to BitcoinSwitch!");
+  Serial.println(" (" + String(VERSION) + ")");
+  clearTFT();
+  printTFT("BitcoinSwitch", 21, 21);
+  printTFT(String(VERSION), 21, 42);
+}

bitcoinSwitch/100_config.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#define VERSION "v1.0.1"
+
+#define BOOTUP_TIMEOUT 2 // seconds
+#define CONFIG_NAME "config"
+
+// uncomment if you dont want to use the configuration file
+// #define HARDCODED
+
+// device specific configuration / defaults
+#define CONFIG_SSID "mywifi"
+#define CONFIG_PASSWORD "mypw"
+#define CONFIG_DEVICE_STRING ""
+
+#include <Arduino.h>
+
+#include "300_tft.h"
+#ifndef HARDCODED
+#include <Preferences.h>
+#include "101_serial_config.h"
+#include "102_portal_config.h"
+#endif
+
+extern String config_ssid;
+extern String config_password;
+extern String config_device_string;
+
+void showWelcomeScreen();
+void setupConfig();
+
+#ifndef HARDCODED
+bool readConfig();
+void executeConfigBoot();
+void clearConfig();
+void saveConfig();
+#endif