Vehicle data retrieving
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Which will serve better for the purpose of data retrieving from vehicles, NodeMCU or Rasberry pi
It is for the purpose of securing information via blockchain. (we want to store the retrived data using blockchain)
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@Abhay can you please let us know what kind of vehicle data would you require?? Because there are very easy ways I can suggest if what parameters do you want to obtain from vehicles?
And also let us know whether you are planning to require the data for cars???
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Hi @Abhay ,
I don't know what exactly your application is or what you are going to do with the data is ? if you want to read vehicle data you can use OBD-II CAN-BUS development kit. also for the esp vs raspberry pi decision is also depends upon what you are doing with the data.
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@kowshik1729 accelerometer reading, gps location, airbag activation etc. Are the main reading were are looking at present. We are planing to collect it from car as a live demo and store it using blockchain.
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@salmanfaris OBD devices are in every new cars right, I don't know if I am right but I think we need seperate android app to collect data using obd and i think it don't retrive accelerometer reading i guess.
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Hi @Abhay ,
Yes, OBD interfaces are now available in most the cars these days , you can get the vehicle sensor data using the OBD interface and you can process it using any controller like esp8266 or something.
Car => Data => OBD => Micorcontroller
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@salmanfaris don't we need seperate android apps for collecting those data.?
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@Abhay As you mentioned, I strongly feel that, the infotainment systems inside the cars these days aren't serving data like GPS location and all. I have used the OBD(On-Board Diagnostics) module in order to acquire data like Fuel tank levels, acceleration of the car, Brake levels, Battery levels, etc., In order to acquire the data like GPS you can install your own GPS module like UBLOX GPS sensor which can be easily interfaced over UART of any MCU's like ESP8266, ESP32, Arduino etc., and pertaining to your last question in the thread I would say "NO" you don't need any separate android apps to obtain data from OBD devices(if they are Bluetooth enabled). Because OBD's like ELM327 is Bluetooth enabled and hence you can use a simple Bluetooth terminal app to connect and get the data.
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Hi @kowshik1729
Thank you for the insight. Will definitely post further queries here as we progress on the project. Hope you could suggest answers like these again. Thank you -
@Abhay Glad that it helped you. Yes, I can suggest you with the queries as far as I know. All the best..!!
Recent Posts
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@Suhailjr But I think since it's not a plug and plug play system and it will laying on the PCB for the long term, it might be fine. for me, it's similar to the Intel Edison and the PICO-IMX7 System-on-Module
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@salmanfaris at last they update their design. T
What you think on the updated connector. I felt like its more fragile and high chance for corottion issue due to humidity for long term use. -
Built on the same 64-bit quad-core BCM2711 application processor as Raspberry Pi 4, Compute Module 4 delivers a step-change in performance over its predecessors: faster CPU cores, better multimedia, more interfacing capabilities, and, for the first time, a choice of RAM densities and a wireless connectivity option.
You can find detailed specs here,
1.5GHz quad-core 64-bit ARM Cortex-A72 CPU VideoCore VI graphics, supporting OpenGL ES 3.x 4Kp60 hardware decode of H.265 (HEVC) video 1080p60 hardware decode, and 1080p30 hardware encode of H.264 (AVC) video Dual HDMI interfaces, at resolutions up to 4K Single-lane PCI Express 2.0 interface Dual MIPI DSI display, and dual MIPI CSI-2 camera interfaces 1GB, 2GB, 4GB or 8GB LPDDR4-3200 SDRAM Optional 8GB, 16GB or 32GB eMMC Flash storage Optional 2.4GHz and 5GHz IEEE 802.11b/g/n/ac wireless LAN and Bluetooth 5.0 Gigabit Ethernet PHY with IEEE 1588 support 28 GPIO pins, with up to 6 × UART, 6 × I2C and 5 × SPI
Compute Module 4 IO Board
The IO board provides:
Two full-size HDMI ports Gigabit Ethernet jack Two USB 2.0 ports MicroSD card socket (only for use with Lite, no-eMMC Compute Module 4 variants) PCI Express Gen 2 x1 socket HAT footprint with 40-pin GPIO connector and PoE header 12V input via barrel jack (supports up to 26V if PCIe unused) Camera and display FPC connectors Real-time clock with battery backupMore details:
https://www.raspberrypi.org/products/compute-module-4/?variant=raspberry-pi-cm4001000, https://www.raspberrypi.org/blog/raspberry-pi-compute-module-4/ -
https://www.dexterindustries.com/howto/run-a-program-on-your-raspberry-pi-at-startup/
This link has even more extensive ways to do it
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Hi @Akhil I found the following answer in one of the forums. here is the link to the thread.
The way that I've seen most people do it (have a look on the Raspberry Pi forums), and have done myself with success is using /etc/rc.local.
All you need to do here is put ./myscript in the rc.local text file. If it's in python, put python myscript.py.
This literally is "a simple solution, (like dropping my script in some "startup" directory or something similar)"- maybe search on the forums when you're having questions as well, this solution came up on the first 4 results of a google search!