Posts: 16
Joined: Mon Jan 28, 2013 12:57 pm

Raspberry RFID UHF

Mon Jan 28, 2013 1:16 pm


is there a RFID reader (compatible with Raspberry) who can reads tags on a distance greater than 1 meter ?

Thank you

Posts: 3
Joined: Thu Oct 24, 2013 5:55 pm

Re: Raspberry RFID UHF

Tue Feb 18, 2014 9:29 pm

How about this: ... pc-g2.html

You would probably need the 8dBi antenna to go with it to increase the read range.

Posts: 1
Joined: Tue Apr 08, 2014 8:28 am

Re: Raspberry RFID UHF

Tue Apr 08, 2014 8:33 am

Could you please share more relevant resources or similar projects using this kind of UHF readers done with Raspi?

Posts: 28
Joined: Mon Jul 16, 2012 1:34 pm

Re: Raspberry RFID UHF

Wed Apr 08, 2015 1:10 pm


Has anyone had success with this? I just tried with a student on Monday to get this (cottonwood long range rfid) working with the RPI without quick success....

we were working off these two posts but were having trouble: ... id-reader/ ... al-driver/

Anyone with tips?


Posts: 1
Joined: Tue Jul 14, 2015 4:58 pm

Re: Raspberry RFID UHF

Tue Jul 14, 2015 5:01 pm

Has anyone had any luck with this? Would love to see a project with coding with the cottonwood and RPi.

Posts: 6
Joined: Wed Oct 21, 2015 3:59 pm

Re: Raspberry RFID UHF

Tue Dec 15, 2015 6:41 pm

I bought this Cottonwood kit: ... cts_id=232

The AS399x reader module and the 8dbi antenna.

My reader was configured to use USB, which worked fine on windows but I was not able to read/write over USB on the raspberry pi. They included the 'debug' cable, and was able to follow the guide to flash the reader to do UART.

I now have the Raspberry Pi connected via UART, and after disabling the 'serial console' on the Pi, can attach a Python serial script to ttyAMA0, send and receive commands.

Writing the version command (string1 = "\x10\x03\x01") returns the version data as documented and writing the 'read card' string (string2 = "\x37\x05\x01\x02\x06") does return a string that looks somewhat IDish.

I think what I need now is to figure out how to clear buffers, read antenna strength, read frequency info, then tune it up to read ID tags to fit my application.

Posts: 1
Joined: Fri Jul 01, 2016 10:42 pm

Re: Raspberry RFID UHF

Fri Jul 01, 2016 11:05 pm

Were you able to pull tag data from the AMS module? I am looking to do something very similar. Any help would be much appreciated!

Posts: 2
Joined: Mon Aug 29, 2016 8:49 am

Re: Raspberry RFID UHF

Mon Aug 29, 2016 8:55 am

Anyone has any success with this one? I am looking Python source to read RFID -tags with Cottonwood UHF reader?

I have now a following setup:

USB -> Foca Pro

Foca Pro GND -> Cottonwood GND
Foca Pro RXD -> Cottonwood TX0
Foca Pro TXD -> Cottonwood RX0

I have connected 5V external power to Cottonwood
I have also connected external RFID antenna to Cottonwood

Red light is blinking on Cottonwood

I have downloaded source and saved it to RPI

When I run nothing happens.

What I am doing wrong ?

Posts: 2
Joined: Mon Aug 29, 2016 8:49 am

Re: Raspberry RFID UHF

Mon Aug 29, 2016 12:59 pm

It seems that the problem is the baud rate, when changed it to 9600 it seems to work. Just need some tags to test if it works now.

Posts: 1
Joined: Sat Aug 19, 2017 10:19 am

Re: Raspberry RFID UHF

Sat Aug 19, 2017 10:49 am

What was the results ? What maximum distance ?

Posts: 1
Joined: Tue Apr 28, 2020 7:19 pm

Re: Raspberry RFID UHF

Tue Apr 28, 2020 7:20 pm

I'm working on a project that needs a UHF RFID reader that can read greater than 1m as well. Were there any more development to this project/thread?

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