esp-idf-rc-switch

315/433MHz ASK RF driver for esp-idf. There are several repositories available for esp-idf, but I couldn't find a submittable library. This repository can send and receive.

I ported from here.

Software requirements

ESP-IDF V4.4/V5.x. ESP-IDF V5.0 is required when using ESP32-C2. ESP-IDF V5.1 is required when using ESP32-C6.

Hardware requirements

315MHz/433MHz ASK Wireless transmitter/receiver like this.

Transmitter H34A-433/H34A-315 SYN115 STX882
Receiver H3V3/H3V4/H5V3/H5V4 SYN480R LR43B/LR33B SRX882/SRX887

I used this:

Note As far as I know, there are 5V module and 3.3V module in the receiving module. Only 3.3V modules can be used with the ESP32.

Installation

git clone https://github.com/nopnop2002/esp-idf-rc-switch
cd esp-idf-rc-switch
idf.py set-target {esp32/esp32s2/esp32s3/esp32c2/esp32c3/esp32c6}
idf.py menuconfig
idf.py flash

Configuration

On the transmitting side, you can choose the protocol and the number of data bits. config-transmit

The available protocols are:

static const Protocol proto[] = {
  { 350, {  1, 31 }, {  1,  3 }, {  3,  1 }, false },    // protocol 1
  { 650, {  1, 10 }, {  1,  2 }, {  2,  1 }, false },    // protocol 2
  { 100, { 30, 71 }, {  4, 11 }, {  9,  6 }, false },    // protocol 3
  { 380, {  1,  6 }, {  1,  3 }, {  3,  1 }, false },    // protocol 4
  { 500, {  6, 14 }, {  1,  2 }, {  2,  1 }, false },    // protocol 5
  { 450, { 23,  1 }, {  1,  2 }, {  2,  1 }, true },     // protocol 6 (HT6P20B)
  { 150, {  2, 62 }, {  1,  6 }, {  6,  1 }, false },    // protocol 7 (HS2303-PT, i. e. used in AUKEY Remote)
  { 200, {  3, 130}, {  7, 16 }, {  3,  16}, false},     // protocol 8 Conrad RS-200 RX
  { 200, { 130, 7 }, {  16, 7 }, { 16,  3 }, true},      // protocol 9 Conrad RS-200 TX
  { 365, { 18,  1 }, {  3,  1 }, {  1,  3 }, true },     // protocol 10 (1ByOne Doorbell)
  { 270, { 36,  1 }, {  1,  2 }, {  2,  1 }, true },     // protocol 11 (HT12E)
  { 320, { 36,  1 }, {  1,  2 }, {  2,  1 }, true }      // protocol 12 (SM5212)
};

//{pulseLength, {syncFactor.high, syncFactor.low}, {zero.high, zero.low}, {one.high, one.low}, invertedSignal}

Wirering

Radio Module		ESP32
DATA	--	GPIO4
GND	--	GND
VCC	--	3.3V

You can change data pin to any pin using menuconfig.

Communicat with Arduino Environment

I used this library on Arduino environment. The sample code for the Arduino environment can be found in the ArduinoCode folder.

From ESP32 to UNO

From UNO to ESP32

Using garage door 315/433MHz Remote

You can control ESP32 using garage door 315/433Mhz remote. You can buy it on AliExpress or eBay for about $3. 433MHz

Build the firmware as Receiver. Fire the RF using the RF remote control. GarageDoor