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ESP32_RELAY_X1 over BLE
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/* -*- mode: c++ -*- | |
* | |
* Copyright 2024 iomonad <iomonad@riseup.net> | |
* | |
* Permission is hereby granted, free of charge, to any person obtaining a copy | |
* of this software and associated documentation files (the “Software”), to deal | |
* in the Software without restriction, including without limitation the rights | |
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
* copies of the Software, and to permit persons to whom the Software is | |
* furnished to do so, subject to the following conditions: | |
* | |
* The above copyright notice and this permission notice shall be included in | |
* all copies or substantial portions of the Software. | |
* | |
* THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
* IN THE SOFTWARE. | |
*/ | |
#pragma once | |
#define SERVICE_UUID "c0ffeeee-1337-1337-1337-c5c9c331914b" | |
#define CHARACTERISTIC_UUID "beb5483e-36e1-4688-b7f5-ea07361b26a8" | |
// See: https://www.bluetooth.com/wp-content/uploads/Files/Specification/HTML/Assigned_Numbers/out/en/Assigned_Numbers.pdf?v=1716982826526 | |
// Stealth car shit | |
#define RELAY_CHARACTERISTIC_UUID 0x0A88 | |
#define RELAY_GPIO_PORT 0x10 | |
#define BLE_MAGIC_SWITCH_ON "K7v3JnhfL5Ar9n6" | |
#define BLE_MAGIC_SWITCH_OFF "QNrGcirdP374uY5" |
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/* -*- mode: c++ -*- | |
* | |
* Copyright 2024 iomonad <iomonad@riseup.net> | |
* | |
* Permission is hereby granted, free of charge, to any person obtaining a copy | |
* of this software and associated documentation files (the “Software”), to deal | |
* in the Software without restriction, including without limitation the rights | |
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
* copies of the Software, and to permit persons to whom the Software is | |
* furnished to do so, subject to the following conditions: | |
* | |
* The above copyright notice and this permission notice shall be included in | |
* all copies or substantial portions of the Software. | |
* | |
* THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
* IN THE SOFTWARE. | |
*/ | |
#include "esp_err.h" | |
#include "esp_check.h" | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <memory> | |
#include "freertos/FreeRTOS.h" | |
#include "freertos/task.h" | |
#include "freertos/queue.h" | |
#include "freertos/semphr.h" | |
#include <BLEDevice.h> | |
#include <BLEServer.h> | |
#include <BLEUtils.h> | |
#include <BLE2902.h> | |
#include <BLEScan.h> | |
#include <BLEAdvertisedDevice.h> | |
#include <BLERemoteCharacteristic.h> | |
#include <EEPROM.h> | |
#include "esp32_x1_relay.hpp" | |
#if !defined(CONFIG_BT_SPP_ENABLED) | |
#error Serial Bluetooth not available or not enabled on the ESP32 | |
#endif | |
static BLEServer *ble_server = NULL; | |
static BLECharacteristic* pCharacteristic = NULL; | |
static BLECharacteristic* relayCharacteristic = NULL; | |
static bool relay_enabled = false; | |
static bool isConnected = false; | |
static SemaphoreHandle_t ble_relay_sem; | |
/* _____ __ .__ .__ __ */ | |
/* / _ \ _____/ |_|__|__ _|__|/ |_ ___.__. */ | |
/* / /_\ \_/ ___\ __\ \ \/ / \ __< | | */ | |
/* / | \ \___| | | |\ /| || | \___ | */ | |
/* \____|__ /\___ >__| |__| \_/ |__||__| / ____| */ | |
/* \/ \/ \/ */ | |
class BLECallbacks : public BLEServerCallbacks { | |
void onConnect(BLEServer *pServer) { | |
printf("ble: new connection open\n"); | |
isConnected = true; | |
}; | |
void onDisconnect(BLEServer *pServer) { | |
printf("ble: device disconnected\n"); | |
isConnected = false; | |
} | |
}; | |
class RelayCallback : public BLECharacteristicCallbacks { | |
void onWrite(BLECharacteristic* ledCharacteristic) { | |
const std::string rxValue = ledCharacteristic->getValue(); | |
if (xSemaphoreTake(ble_relay_sem, portMAX_DELAY) && isConnected) { | |
if (rxValue == BLE_MAGIC_SWITCH_ON) { | |
EEPROM.write(0x00, 0xFF); | |
digitalWrite(RELAY_GPIO_PORT, HIGH); | |
} | |
if (rxValue == BLE_MAGIC_SWITCH_OFF) { | |
EEPROM.write(0x00, 0x00); | |
digitalWrite(RELAY_GPIO_PORT, LOW); | |
} | |
} else { | |
printf("err: write on disconnect or semaphore timeout\n"); | |
} | |
/* Release sem */ | |
xSemaphoreGive(ble_relay_sem); | |
} | |
}; | |
static void ble_server_lifecycle(void *_params) { | |
for (;;) { | |
if (!isConnected) { | |
vTaskDelay(pdMS_TO_TICKS(500)); | |
ble_server->startAdvertising(); | |
printf("ble: advertising\n"); | |
} | |
vTaskDelay(pdMS_TO_TICKS(10000)); | |
} | |
}; | |
/* ___________ __ .__ __ */ | |
/* \_ _____/ _____/ |________ ___.__.______ ____ |__| _____/ |_ */ | |
/* | __)_ / \ __\_ __ < | |\____ \ / _ \| |/ \ __\ */ | |
/* | \ | \ | | | \/\___ || |_> > <_> ) | | \ | */ | |
/* /_______ /___| /__| |__| / ____|| __/ \____/|__|___| /__| */ | |
/* \/ \/ \/ |__| \/ */ | |
void setup () { | |
Serial.begin(115200); | |
int relay_status = EEPROM.read(0x00); | |
pinMode(RELAY_GPIO_PORT, OUTPUT); | |
digitalWrite(RELAY_GPIO_PORT, (relay_status == 0x00) ? LOW : HIGH); | |
BLEDevice::init("st_pierre"); | |
ble_server = BLEDevice::createServer(); | |
ble_server->setCallbacks(new BLECallbacks()); | |
ble_relay_sem = xSemaphoreCreateBinary(); | |
xSemaphoreGive(ble_relay_sem); | |
BLEService *ble_svc = ble_server->createService(SERVICE_UUID); | |
pCharacteristic = ble_svc->createCharacteristic( | |
CHARACTERISTIC_UUID, | |
BLECharacteristic::PROPERTY_READ | | |
BLECharacteristic::PROPERTY_WRITE | | |
BLECharacteristic::PROPERTY_NOTIFY | | |
BLECharacteristic::PROPERTY_INDICATE); | |
relayCharacteristic = ble_svc->createCharacteristic( | |
(uint16_t) RELAY_CHARACTERISTIC_UUID, | |
BLECharacteristic::PROPERTY_READ | | |
BLECharacteristic::PROPERTY_WRITE | | |
BLECharacteristic::PROPERTY_INDICATE); | |
relayCharacteristic->setCallbacks(new RelayCallback()); | |
/* Start SVC server */ | |
ble_svc->start(); | |
BLEAdvertising *pAdvertising = BLEDevice::getAdvertising(); | |
pAdvertising->addServiceUUID(SERVICE_UUID); | |
pAdvertising->setScanResponse(false); | |
pAdvertising->setMinPreferred(0x0); | |
BLEDevice::startAdvertising(); | |
xTaskCreate(ble_server_lifecycle, "ble_mgmt_task", 10000, NULL, 1, NULL); | |
} | |
void loop () {} |
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build: | |
arduino-cli compile -v -p /dev/ttyUSB0 --fqbn esp32:esp32:esp32 | |
flash: | |
arduino-cli compile -v -p /dev/ttyUSB0 --fqbn esp32:esp32:esp32 -u | |
setup: | |
arduino-cli core install esp32:esp32 |
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