Device catalog
Third-party meters and sensors that an ESP32 running Synacl's gateway firmware reads out of the box. Pick one in the app and its register map, scaling and connection defaults are filled in — and every entry is a page here you can check against the datasheet. Synacl is software only: we don't sell, ship or bundle any of these devices, or the ESP32.
Energy meters
Eastron SDM120-ModbusModbus RTU (RS-485)Datasheet-derived
Eastron · Single-phase DIN-rail kWh meter with Modbus RTU over RS-485, common on sub-metering and solar installs. This entry reads the live electrical values p…
Eastron SDM230-ModbusModbus RTU (RS-485)Datasheet-derived
Eastron · Single-phase 100 A DIN-rail kWh meter with Modbus RTU over RS-485 — the bidirectional big brother of the SDM120, popular for solar import/export mete…
Eastron SDM630-ModbusModbus RTU (RS-485)Datasheet-derived
Eastron · Three-phase DIN-rail kWh meter with Modbus RTU over RS-485, the standard choice for panel and feeder metering. This entry reads per-phase voltage, cu…
Peacefair PZEM-004T v3.0Modbus RTU (RS-485)Datasheet-derived
Peacefair · The hobbyist single-phase AC energy monitor: a PCB with a split-core CT, sold with a TTL serial header. It speaks Modbus RTU, so through a TTL-to-R…
Environment sensors
BH1750 ambient light sensorI²CBench-verified
ROHM · The ubiquitous I²C light sensor breakout (GY-302 and friends), read through the gateway's generic I²C driver. It reports illuminance in lux from about 1…
Bosch BME280 temperature, humidity & pressureI²CDatasheet-derived
Bosch Sensortec · The standard three-in-one environmental sensor, read by the gateway's built-in BME280 driver — no register map to enter. Temperature in °C, r…
DS18B20 1-Wire temperature probe1-WireDatasheet-derived
Analog Devices (Maxim) · The classic waterproof stainless temperature probe, read over a single data wire by the gateway's 1-Wire driver. Good for tanks, pipes…
Sensirion SHT31 temperature & humidityI²CDatasheet-derived
Sensirion · A factory-calibrated digital temperature and humidity sensor with better accuracy than the DHT family, read by the gateway's built-in SHT31 driver.…
XY-MD02 (SHT20 RS-485)Modbus RTU (RS-485)Datasheet-derived
Generic (XY-MD02) · A low-cost boxed RS-485 temperature and humidity transmitter built around a Sensirion SHT20, sold under many brands as the XY-MD02. It repo…
Bench-verified = confirmed on real hardware by Synacl · Datasheet-derived = transcribed from the vendor datasheet, not yet confirmed on hardware — report a mismatch.
Missing a device? Ask for it — or add any Modbus RTU, I²C or 1-Wire device by hand; the catalog is a shortcut, not a limit.