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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 battery monitor mcu enclosure measurement battery voltage pcb layout alarm system bluetooth low energy 32bit software pcb manufacturi pcba dc-to-dc antenna • • 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.
    • openhardware.io

      💬 MySensors Battery node 2xAAA for SI/BME/SHT
      OpenHardware.io • mysensors temperature & humidity sensor battery sensor • • openhardware.io  

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    • Siddharth Velappan

      MH Z19b - Running CO2 sensor on batteries
      Hardware • battery battery powered battery sensor sensors co2 z19 mhz19 mh z19 co2 sensors mhz19b z19b mh z19b • • Siddharth Velappan  

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      bitttttten

      Hi @Siddharth-Velappan The warmup time of the MH Z19b is 3 minutes. So 2 is probably fine, but you could probably do 3 just in case. Although 2 would save your more battery time. Do you mind explaining your setup a bit more? I would love to do something similar but I do not know where to get started with the PIC microcontroller!
    • openhardware.io

      💬 JMP Arduino Pro Mini Multisensor Board v2.1
      OpenHardware.io • nrf24l01 rfm69 battery mysensor node battery sensor tp4056 multisensors • • openhardware.io  

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      jumping

      @anticimex You are too fast Now the CERN files are uploaded!!
    • openhardware.io

      💬 Door/Windows AAA
      OpenHardware.io • mysensors nrf24l01 mysensor battery sensor window door contact • • openhardware.io  

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      arden

      id also second the use of 18650s
    • openhardware.io

      💬 NodeManager
      OpenHardware.io • mysensors arduino contest2017 newbie battery sensor • • openhardware.io  

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      RPunkt

      @user2684 Thanks a lot
    • openhardware.io

      💬 Piglets - IOT Development Board
      OpenHardware.io • rfm69 atmega328 low power lora node battery sensor rfm95 rtc spi flash external clock eui-64 • • openhardware.io  

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      hiddenuser

      @doug Can't wait for you to release the BOM