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Questions tagged [rfm69]

The tag has no usage guidance.

-1
votes
2answers
45 views

RFM95/96 Multi Transmitter and One Receiver

We're working on a model rocket project. And we need two transmitters and one receiver. One of the transmitters is for the rocket body and the other is for the scientific payload in the rocket; the ...
0
votes
1answer
97 views

strange RFM95 SPI behaviour with STM32L4 [closed]

I am using CubeMX and HAL to program an STM32L4. I am trying to communicate with RFM96 module using SPI, but I am getting nonsensical results. According to the RFM96 datasheet, in order to read a ...
3
votes
2answers
620 views

STM32 SPI not working as I expect it should based on online reading

I am using an STM32F103C8 to connect to a Hope RF95W transceiver IC for the purpose of learning. I am only trying to read the chip version register, then write a config register that has a 0x00 reset ...
0
votes
2answers
244 views

Unable to get SPI working on STM32 Cortex-M3 (Blue Pill) with CMSIS

I am trying to connect to an RFM95W module using the Cortex-M3 Blue Pill from ST. I am an embedded novice but know my way around linux, so I used the below code on an Rpi3 to connect to the chip and ...
1
vote
2answers
1k views

Half-wave coiled antenna or quarter wave straight?

The transmitters for hobby projects working on 433/868/915 MHz (RFM69) require an antenna connected to the board. The board is battery powered, without metallic chassis and overall much smaller than ...