AN277 Temp and Humidity Sensor Updates 2025

Due to supply issues for previous hardware, a new model of temperature and humidity sensors will be shipped by AC&E in 2025. Any new EWS, Temperature and Humidity Node, or Digital IO Node will be shipped with firmware that supports the new sensors. Existing EWS will require a firmware update to support the new sensors, available on the AC&E website. All existing pre 2025 temperature and humidity sensors will remain compatible with all versions of firmware. A table summarising the change can be seen below:

EWS Temp and Humidity Probe

Old Model AM2305, AM2315
New Model AM2305B
Connector Pins 3
Min EWS Firmware for AM2305B 2.1.23

 

EWS Plus (EWS2), Temp and Humidity Node, Digital IO Node

Old Model AM2315
New Model AM2315C
Connector Pins 4
Min EWS2 Firmware Required for AM2315C & AHT2415C 2.1.23
Min Temp and Humidity, Digital IO Node Firmware Required for AM2315C & AHT2415C 1.1.10