Building a Cold-Chain Monitor with the Govee H5108
The Govee H5108 is a BLE (Bluetooth Low Energy) device that measures temperature with a wired sensor. It uses the ESP32 as a gateway to send measurements to an endpoint for use.
1 · The parts
1 × Govee Bluetooth thermometer
Watches the cold from outside it: the H5108's wired probe reaches into the cooler while its body and radio stay out where they can be heard. Broadcasts every few seconds.
1 × An ESP32 board
Runs the BLE Sensor Listener. Sits within Bluetooth range of the cooler, hears every reading, and pushes each one to the endpoint you own.
1 × IP65 sealed project box
Keeps the board dry in a washdown room, a barn, or outside.
2 · Load the program
“Flashing” means loading the program onto the board, the way you would install an app on a phone. Do it first, at the bench: plug the board in over USB and press the install button for your board on the program’s own page. The board does not need its sensor connected to take the program; the program waits.
3 · Wire and place it
Put the H5108’s wired probe inside the cooler and mount its body outside the cold space: metal walls block radio, so the body and its radio stay out where the board can hear them.
Set the board anywhere within Bluetooth range on USB power; if that spot is damp or dusty, it lives in the sealed box. No wiring between sensor and board: the thermometer broadcasts, the board listens.
4 · Choose where readings go
During setup the board asks for one address: where every reading should land. That is your webhook or MQTT broker. If you do not have one yet, use the Test Bench. Enter it in the program’s Set It Up section along with your Wi-Fi; its Push Now check tells you readings are landing.