# Sparkfun CAN BUS shield with Arduino Please Helppp

**URL:** <https://community.sparkfun.com/t/sparkfun-can-bus-shield-with-arduino-please-helppp/63051>\
**Category:** MicroMod\
**Created:** [January 28, 2025, 8:48am UTC](https://community.sparkfun.com/t/sparkfun-can-bus-shield-with-arduino-please-helppp/63051 "2025-01-28T08:48:30Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Abdulaziz\_BA](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/abdulaziz_ba/32/7869_2.png) [@Abdulaziz\_BA](https://community.sparkfun.com/u/Abdulaziz_BA)\
**Post date:** [January 28, 2025, 8:48am UTC](https://community.sparkfun.com/t/sparkfun-can-bus-shield-with-arduino-please-helppp/63051/1 "2025-01-28T08:48:30Z")

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What I want to do is getting odometer reading and some other information (rpm speed,) out of my cars obd2 port and save it into the SD card on the shield. I was suggested to use the uno-Sparkfun shield setup but right now when I have the hardware I couldnt do a thing!. This is my first project and im really planning to return everything and use ESP32 with MCP2515 because of lack of much resources on the shield- Arduino setup unlike the esp32 which has plenty of detailed setup instructions. I read the hook up guide and really didnt get it to be honest. Can someone tell me what I really need to do do get this do?

I also seen people using two shields to deal with the CAN bus! Do I need two do get what I want done?  
Please I neeeed help  
What I have :  
CAN-BUS Shield  
Uno R3  
OBD-II to DB9 Cable  
OBD-II Connector  
SparkFun OBD-II UART (I just bought it to be sure I have all stuff needed to get my design done and will be no need to order stuff again)  
Macchina OBD-II Extender Cable.

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**Author:** ![TS-Russell](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/ts-russell/32/6092_2.png) [@TS-Russell](https://community.sparkfun.com/u/TS-Russell)\
**Post date:** [January 29, 2025, 12:05am UTC](https://community.sparkfun.com/t/sparkfun-can-bus-shield-with-arduino-please-helppp/63051/2 "2025-01-29T00:05:53Z")

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You won’t need both shields, unless you’re doing something funky 🙂 You also probably won’t use the obd2-uart adapter…and the extender only if you need more length. [We have an SD example](https://learn.sparkfun.com/tutorials/can-bus-shield-hookup-guide#arduino-library-installation) within our [Hookup Guide](https://learn.sparkfun.com/tutorials/can-bus-shield-hookup-guide#hardware-overview)