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ESP32-C6 wifi/zigbee to RS485 bridge
€30,00
ESP32-C6 Zigbee/WiFi to RS485 Interface Board
This compact board uses the ESP32-C6 to bridge Zigbee or WiFi networks with RS485- or Modbus RTU-enabled devices.
Devices you could potentially communicate with
I used this board to connect my Nibe heat pump (F1255-6 R PC) to Home Assistant. The list of devices that this device can communicate with is extensive. Below a list of projects this board could potentially be used in. Please do some additional research yourself to determine if this board indeed suits your needs.
- Nibe heat pump
- Mitsubishi Ecodan
- Alpha Innotec / Novelan
- Genvex
- Itho Daalderop ventilation units
- Danfoss
- Systemair
- Eastron energy meters
- DDS238-2 energy meters
- Carlo Gavazzi EM24/EM340
- SolarEdge inverters
- Schneider PM2200
Details
The board is equipped with the following ICs:
- ESP32-C6
- MAX13487E Equivalent (COSMAX13487EESA), Half-Duplex RS-485/RS-422-Compatible Transceiver with AutoDirection Control.
The interfacing between the ICs is as follows:
| Pin ESP32-C6 | Pin COSMAX13487E |
|---|---|
| GPIO4 | nSHDN |
| GPIO5 | nEN |
| GPIO6 | RO |
| GPIO7 | DI |
The board is equipped with two connectors:
- USB-C
- 4-pin spring terminal for easy wire connection and disconnection
Both connectors can be used simultaneously. The spring terminal is labeled clearly on the board’s silkscreen:
| Pin | Description |
|---|---|
| Vin | 12 V – 24 V input (max ~40 mA at 12 V) |
| GND | Ground |
| B | RS485 line B |
| A | RS485 line A |
Notes
- Please contact me if shipping rates for your country are not available.
- If you are connecting this board to a device in your house, be aware that wiring it wrongly may cause permanent damage to this device. This is at your own risk.
Links
-
NibeGW for ESP32-C6
Integration gateway for Nibe heat pumps via ESP32-C6 -
ESPHome for ESP32-C6
ESPHome custom configuration and setup tailored for the ESP32-C6 - 3D-printable housing