184 lines
2.9 KiB
Markdown
184 lines
2.9 KiB
Markdown
# A gateway for 433 MHz devices
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It uses [rc_switch](https://github.com/sui77/rc-switch) library for controlling wall sockets.
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It supports receiving:
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- serial commands for controlling wall switches - all protocols
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- RC commands from wall switches remotes - protocols 1 and 2
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- sensors states over `Protocol 2`
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It acts as a serial gateway, communicating in JSON format, and it is connected to a Raspberry Pi running Home Assistant.
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It uses an Arduino Pro Mini 5v 16 Mhz.
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The original bootloader has been replaced with Optiboot using this tutorial: https://andreasrohner.at/posts/Electronics/How-to-make-the-Watchdog-Timer-work-on-an-Arduino-Pro-Mini-by-replacing-the-bootloader/
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## Receive RC
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### Sensors
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Sensors transmit state using `Protocol 2` and the gateway translates them into JSON over serial.
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##### Protocol structure
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```
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STATE
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1010|1|101010101|1010101010101|10101
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----|-----------|-------------|-----
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TYPE| VALUE | VCC | ID
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```
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##### Sensors types
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```C++
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enum SensorType : uint8_t {
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GENERIC = 4,
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HUMIDITY = 5,
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TEMPERATURE = 6,
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CONTACT = 7
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};
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```
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##### Sensors IDs
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```C++
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enum SensorId : uint8_t {
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WINDOW1 = 1,
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WINDOW2 = 2,
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WATER_SENSOR = 3,
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TEMP_SENSOR = 4,
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LIGHT_SENSOR = 5,
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MOVEMENT_SENSOR = 6,
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OIL_SENSOR = 7
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};
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```
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#### Stairs temperature
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##### Value and voltage
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```json
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{
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"sensor": {
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"id": 4,
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"diagnostic": {
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"voltage": 2.239
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},
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"temperature": 16.2
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}
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}
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```
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##### Value only
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```json
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{
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"sensor": {
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"id": 4,
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"temperature": 16.2
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}
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}
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```
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#### Oil sensor
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##### Value and voltage
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```json
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{
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"sensor": {
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"id": 7,
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"diagnostic": {
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"voltage": 4.282
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},
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"value": 13
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}
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}
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```
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### Switches
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Gateway receives remote commands over RC Switch and translates them into JSON over serial
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#### Protocol 1
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##### on
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```json
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{
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"rcSwitch": {
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"protocol": 1,
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"state": true,
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"group": "1",
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"channel": 1,
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"raw_value": 5571921
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}
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}
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```
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##### off
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```json
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{
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"rcSwitch": {
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"protocol": 1,
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"state": false,
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"group": "1",
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"channel": 1,
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"raw_value": 5571921
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}
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}
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```
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#### Protocol 2
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```json
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{
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"rcSwitch": {
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"protocol": 2,
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"value": 2650807673
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}
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}
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```
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#### Other protocols
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```json
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{
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"rcSwitch": {
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"protocol": 4,
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"value": 1234567890
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}
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}
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```
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### DHT
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Reads local DHT11 sensor and outputs JSON over serial
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```
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{
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"dht11": {
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"temperature": 31.9,
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"humidity": 45
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}
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}
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```
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---
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## Receive commands
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It receives commands over serial, in JSON format, and executes them.
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#### Protocol 1
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##### on
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```json
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{
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"rcSwitch": {
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"protocol": 1,
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"group": "00001",
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"channel": 1,
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"state": true
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}
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}
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```
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##### off
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```json
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{
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"rcSwitch": {
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"protocol": 1,
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"group": "00001",
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"channel": 1,
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"state": false
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}
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}
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```
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#### Protocol 2
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```json
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{
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"rcSwitch": {
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"protocol": 2,
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"value": "10010110000000000001110101111001"
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}
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}
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```
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#### Other protocols
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```json
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{
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"rcSwitch": {
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"protocol": 4,
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"value": "010001101001100101110100"
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}
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}
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```
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