Hi PrachyaSuri, I noticed your profile and would like to see if you are interested to help me with a project. I organise mountain bike races and Id like to use my 125khz RFID wristbands that each rider can wear, tag an RFID reader connected to a raspberry pi and send the RFID ID and timestamp (to high accuracy) to a web server using 3G to store to a database of riders and retrieve that data for live race timing. There would be multple Raspberry Pi/RFID readers. The races are comprised of multiple stages (sometimes up to 6) with each stage having a start and finish.
Each 'timing date' would comprise of:
- raspberry pi
- RFID 125khz reader
- a DS3231 RTC for accurate time and to maintain time if battery loss
- sim900 to connect to the web server (Amazon?)
- buzzer and LED light to indicate a successful tag
Also importantly, if the timing gate lost connection with the server, the RFID tags are stored on the timing gate and able to be downloaded/uploaded to the server once the race is complete.
Would this be something you are interested in and capable of doing?