Offered by German DIY retailer OBI, the OBI Power Tracker is a €15 set of two gadgets, one among which you primarily stick on high of your current electrical energy meter. This then permits for electrical energy utilization to be measured and tracked, with the info despatched to the second, gateway gadget. This latter cloud-bound gadget is linked to an OBI account by way of the heyOBI app. This correspondingly referred to as for the gateway gadget to be reverse-engineered and free of its cloud-based shackles, a process that [Aaron Christophel] fortunately took upon himself.
The entire course of can also be lined in two movies, with the primary offering all of the necessities on reprovisioning the unique firmware for an area MQTT server in English, whereas the second, German-language video focuses on customized firmware for the ESP32-C3 inside the gateway gadget.
The aforementioned reprovisioning possibility doesn’t require firmware flashing, only a handful of steps to observe. This entails fetching the 32-bit TEA key, producing your individual PKI, operating your individual MQTTS-capable dealer and having the supplied Python script deal with the remainder from there.
Flashing customized firmware is the different possibility, with simple UART/JTAG reflashing sadly disabled by the producer. With the trouble required right here you possibly can maybe argue that merely connecting the reader gadget to a customized gateway gadget is likely to be rather a lot simpler, particularly if you have already got a LoRa transceiver and related {hardware}.
