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OTA support over WiFi AP #1

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80 changes: 80 additions & 0 deletions examples/shotStopper/ota_setup.h
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Original file line number Diff line number Diff line change
@@ -0,0 +1,80 @@
#include <WiFi.h>
#include <ESPAsyncWebServer.h>
#include <Update.h>

#define WIFI_SSID "shotStopperAP"
#define WIFI_PASS ""

bool otaMode = false;

AsyncWebServer server(80);

void restartESP(void *param) {
delay(2000); // Give client time to receive response
ESP.restart();
}

void setupOTA() {
// Serve a simple webpage for OTA update
server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
request->send(200, "text/html", "<html><body><h1>ESP32 OTA Update V6</h1>"
"<form method='POST' action='/update' enctype='multipart/form-data'>"
"<input type='file' name='update'><br>"
"<input type='submit' value='Upload'></form></body></html>");
});

// OTA Upload Handler
server.on("/update", HTTP_POST, [](AsyncWebServerRequest *request) {
request->send(200, "application/json", "{\"status\": \"success\"}");
xTaskCreate(restartESP, "restartTask", 1024, NULL, 1, NULL);
}, [](AsyncWebServerRequest *request, const String& filename, size_t index, uint8_t *data, size_t len, bool final) {
if (!index) {
Serial.printf("Start OTA Update: %s\n", filename.c_str());
if (!Update.begin(UPDATE_SIZE_UNKNOWN)) {
Update.printError(Serial);
}
}
if (Update.write(data, len) != len) {
Update.printError(Serial);
}
if (final) {
if (Update.end(true)) {
Serial.println("Update Complete!");
} else {
Update.printError(Serial);
}
}
});
}

void startAPMode() {
if (!otaMode) {
// Start Wi-Fi in AP mode
WiFi.softAP(WIFI_SSID, WIFI_PASS);
Serial.print("AP Mode Started: ");
Serial.println(WIFI_SSID);
setupOTA();
server.begin();
Serial.println("Web Server Started on 192.168.4.1");
otaMode = true;
}
}

// Function to stop Wi-Fi AP mode
void stopAPMode() {
if (otaMode) {
WiFi.softAPdisconnect(true);
server.end();
Serial.println("AP Mode Stopped");
otaMode = false;
}
}

bool checkOTAMode(bool otaModeRequested) {
if (otaModeRequested && !otaMode) {
startAPMode();
} else if (!otaModeRequested && otaMode) {
stopAPMode();
}
return otaMode || otaModeRequested;
}
14 changes: 14 additions & 0 deletions examples/shotStopper/shotStopper.ino
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@

#include <AcaiaArduinoBLE.h>
#include <EEPROM.h>
#include "ota_setup.h"

#define FIRMWARE_VERSION 1
#define MAX_OFFSET 5 // In case an error in brewing occured
Expand Down Expand Up @@ -78,6 +79,7 @@ uint8_t maxShotDurationS = 50; // Primarily useful for latching switches, s
// looses control of the paddle once the system
// latches.
uint8_t dripDelayS = 3; // Time after the shot ended to measure the final weight
bool otaModeRequested = false; // Set to true if OTA mode is being requested.

typedef enum {BUTTON, WEIGHT, TIME, UNDEF} ENDTYPE;

Expand Down Expand Up @@ -132,6 +134,7 @@ BLEByteCharacteristic maxShotDurationSCharacteristic("0xFF16", BLEWrite | BLERe
BLEByteCharacteristic dripDelaySCharacteristic("0xFF17", BLEWrite | BLERead);
BLEByteCharacteristic firmwareVersionCharacteristic("0xFF18", BLERead);
BLEByteCharacteristic scaleStatusCharacteristic("0xFF19", BLERead | BLENotify);
BLEByteCharacteristic otaModeRequestedCharacteristic("0xFF20", BLEWrite | BLERead);

enum ScaleStatus {
STATUS_DISCONNECTED = 0,
Expand Down Expand Up @@ -193,6 +196,7 @@ void initializeBLE() {
shotStopperService.addCharacteristic(dripDelaySCharacteristic);
shotStopperService.addCharacteristic(firmwareVersionCharacteristic);
shotStopperService.addCharacteristic(scaleStatusCharacteristic);
shotStopperService.addCharacteristic(otaModeRequestedCharacteristic);
BLE.addService(shotStopperService);
weightCharacteristic.writeValue(goalWeight);
momentaryCharacteristic.writeValue(momentary ? 1 : 0);
Expand All @@ -203,6 +207,7 @@ void initializeBLE() {
dripDelaySCharacteristic.writeValue(dripDelayS);
firmwareVersionCharacteristic.writeValue(FIRMWARE_VERSION);
scaleStatusCharacteristic.writeValue(STATUS_DISCONNECTED);
otaModeRequestedCharacteristic.writeValue(otaModeRequested ? 1 : 0);
BLE.advertise();
Serial.println("Bluetooth® device active, waiting for connections...");
BLE.setEventHandler(BLEDisconnected, blePeripheralDisconnectHandler);
Expand Down Expand Up @@ -256,6 +261,11 @@ void pollAndReadBLE() {
EEPROM.write(DRIP_DELAY_S_ADDR, dripDelayS);
updated = true;
}
if (otaModeRequestedCharacteristic.written()) {
otaModeRequested = otaModeRequestedCharacteristic.value() != 0;
Serial.print("OTA mode requested: ");
Serial.println(otaModeRequested);
}
if (updated) {
EEPROM.commit();
}
Expand Down Expand Up @@ -287,6 +297,10 @@ void loop() {
// Check for setpoint updates
pollAndReadBLE();

if (checkOTAMode(otaModeRequested)) {
return;
}

// Connect to scale
if (!scale.isConnected()) {
updateScaleStatus(STATUS_DISCONNECTED);
Expand Down