The old version has an ESP8266 12B or 12E model. The new one has a ESP8266 12F model on the pcb board. You see this in the defference of the Wifi antenna.
Kit électrification vélo indépendant du vélo et désactivable
Matériel pro
Simplified Monitoring of Patients in Situations of Mass Hospitalization (MoSimPa)
ESP8266
Firmware proprio a remplacer par Tasmota https://www.tasmota.info/
vnstati - png image output support for vnStat