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    • William Meli

      Car battery health monitoring and alerts system with IoT integration
      My Project • mysensors temperature led ota iot wifi battery powered ble bluetooth low power rgb motion sensor hardware 3d print battery sensor fota mcu enclosure battery monitor pcb layout battery voltage measurement software alarm system bluetooth low energy antenna 32bit pcb manufacturi pcba dc-to-dc • • William Meli  

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      William Meli

      @NeverDie Thx for appreciating the work done. There will also be an open source part in the future. When and how extensive the open source part will be, remains to be seen. The release of certain information (block diagram, ..., in this post) is related to those open source parts. There are some OBD solutions, however most of them (in my experience) give back low frequency data put by the car manufacturer on the OBD-bus (CAN, ...). Therefore transients evolving directly from the battery could only be recorded if the manufacturer sends those data accordingly on the bus. Due to the small bandwidth(also because of other car data that have to be sent, ...), such battery data are sent more often once per second or less. Fast battery events (i.e. cranking events, ...) are therefore imperceptible. Unless the manufacturer processes the fast events and then sends them (once per second or less), which is very unlikely if the manufacturer does not market this feature itself. Third parties devices for high frequency sensing costs several hundreds dollars. In my experience, important battery states (especially the fast ones) are recorded by measuring and processing corresponding data directly on the battery. I agree with you about the limits related to the communication over Bluetooth. But i think Bluetooth 5.0 will improve a lot. However, WiFi will always remain an important option due to the high data throughput. The combination of both (BLE & WiFi), especially with regard to energy consumption, will gain in importance.
    • mfalkvidd

      Reverse-engineering a GL10 ble / bluetooth battery monitor using ESP32
      My Project • esp32 ble battery monitor reverse-engineering gl10 • • mfalkvidd  

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      Nca78

      Nice, thank you for sharing. Not very surprised about the use of running speed and cadence profile as there is no profile for voltage reporting (battery service can only report a percentage).
    • Masonkante

      Battery Level from Mysensor node
      OpenHAB • battery monitor • • Masonkante  

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      Samuel235

      Hello there @Masonkante - I recommend that you check out my current build for reference to battery powering a custom board. I have created a board that uses a ATmega328p-au powered through a coin cell battery to act as a switch module. By all means use my thread for information on how to create a low powered arduino alternative for your desired needs. Thanks, Sam.
    • drock1985

      {QUESTION} Battery Sensor example
      Hardware • arduino nano battery monitor voltage divider • • drock1985  

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      m26872

      @drock1985 Maybe some hints here.