The RDM Responder has built-in support for the following sensors :

• BH1750
  
• Digital 16bit Serial Output Type Ambient Light Sensor IC
• http://rohmfs.rohm.com/en/products/databook/datasheet/ic/sensor/light/bh1721fvc-e.pdf
  
• Type : E120_SENS_ILLUMINANCE
  
• HTU21D
• Digital Relative Humidity sensor with Temperature output
• https://cdn-shop.adafruit.com/datasheets/1899_HTU21D.pdf
• Types: E120_SENS_HUMIDITY, E120_SENS_TEMPERATURE
  
• INA219
• Zerø-Drift,Bi-Directional CURRENT/POWER MONITOR with I2C™ Interface
• https://cdn-shop.adafruit.com/datasheets/ina219.pdf
• Types: E120_SENS_CURRENT, E120_SENS_POWER, E120_SENS_VOLTAGE
• MCP9808
• ±0.5°C Maximum Accuracy Digital Temperature Sensor
• https://cdn-shop.adafruit.com/datasheets/MCP9808.pdf
• Type: E120_SENS_TEMPERATURE
• SI7021
• I2C HUMIDITY AND TEMPERATURE SENSOR
• https://cdn-learn.adafruit.com/assets/assets/000/035/931/original/Support_Documents_TechnicalDocs_Si7021-A20.pdf
• Types: E120_SENS_HUMIDITY, E120_SENS_TEMPERATURE