Our reefer telematics already logs temperature.
We sayOEM reefer logs rarely tie temp events to exact GPS stop and door context — K3 on Wialon correlates BLE sensors; TempTrac adds trailer zones when you need it.
Sensors are another thing to maintain.
We sayBLE pairing is once per trailer; solar GPS sustains location even if a sensor battery is due—~30 min install.
We only need this on pharma lanes.
We sayStart on high-risk lanes; same hardware scales to food and retail without a second platform.
BLE temperature/humidity on trailer with GPS correlation in Wialon — excursion alerts and audit exports; TempTrac or BLE for cargo zones.