We have designed KC868-E8T with Tuya module , 4G LTE module and ESP32, the 8 channel removable relay board.
You can integrate KC868-E8T to home assistant by ESPHome use follow resource:
a. 8 relay relay, 8 channel digital input for switch panel. 4 channel AC220V energy meter (BL0939 energy chip) for load’s voltage, current, power, power consumption. DS18B20 temperature sensor.
b. support use Tuya mobile phone application remote control 8 relay by internet , monitor 4 channel load’s energy meter and temperature by DS18B20 sensor.
c. support use SIM card send SMS to control 8 channel relay.
d. support use 433MHz wireless RF remoter to learn code and control 8 channel relay.
KC868-E8T also is open source. you can download schematic diagram from KinCony’s webpage and ardunio IDE demo source code for this board use by Tuya IoT platform.