Hello everyone! I would like to know if there is someone working with AS3933 chip, 3D Low frequency Wake-up Receiver, to discuss about some issues I’m getting with data trasmission. I contacted with AMS support and they gave me no support, directly. I got so astonished about their response. I app…

Hello @dani68k , I do have a couple people in house that have done some work with AMS and we do have contacts within AMS we can ask, however I would need to know a bit more about the issues you are having. If you could provide some more details I can get in contact with these people and see if we ar…

Hello Robert, Thank you for you fast reply. I’m working on a project using AS3933 as an active TAG. This is on: https://ams.com/as3933 . Wireless sensor nodes/wireless sensor connectivity. We have developped the HARDWARE and FIRMWARE and now I’m getting some problems decoding the data from an 125k…

Hello Daniel, I am one of the application engineers here at Digi-Key. What distance do you start having issues decoding data correctly? Do you have the AS3933DemoKit and how does the distance compare to the kit performance? Have you followed the ams reference design? Any detailed information on the…

Hello Scott, Thank you for your fast reply. Let me prepare detailed information and oscilloscope captures to check the performance of the system. BR, daniel

Hello Scott, I have DEMOKIT, but it’s not possible to work with data transmissions, you can only work in PATTERN detection. I’m attaching schematics, PCB layouts, AS3933 setup and oscilloscope captures. I’m trasmitting BURST + PATTERN + DATA PATTERN = 0x9669 DATA = 21 / 0x0015 / 0b00000000000…

[BOT%20layout] [SCH] [TOP%20layout]

Hello Daniel, We received information back from ams, unfortunately they are unable to provide any technical support on the AS3933. I will review the information and materials you provided and get back to you and try to offer suggestions on increasing the decoding range. Best Regards, Scott

Hello Scott, Ok. So you got the same answer as me from AMS. Waiting for your feedback. Thank you! BR, daniel

Hello Daniel, Have you tried implementing the bit rate and symbol rate register settings in the design guide (2232 b/s and 1130 symbol rate)? R3<2:0> = 011 for 1130 symbol rate R7<4:0> = 01101 for 2232 b/s R3<5:3> = 111 to increase preamble R4<3:0> = 0000 for no gain reduction You could also t…

AS3933

Wireless and IoT RF and Wireless

dani68k January 17, 2019, 1:31pm 8

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