Programming RFM radio modules in Basic

[astanapane]

Hi Richard,

for the schematic i think i'm ok. I can handle it. I keep saying because i know my self, that first i need to understand the basics. Even if you think that is too basic to read about SPI connection, i need to understand it, and get those small important information for me that will help me later.

Now i read this because i find it interesting (not the arduino code) but the information they share are useful. Like the " NODES " , Addressing, Broadcast addressing etc.

I have a long way.

[astanapane]

i have a pair of the Adafruit RFM69HCW Transceiver Radio Breakout - 433 MHz, in which there is a voltage regulator and level shifter, so the voltage range is 3-5 volts.

[richard]

imho the example schematic from hoperf data sheet has miso/mosi names transposed on the module so be wary.

mosi is master out slave in and pic is the master

[astanapane]

yes i have noticed. I will use the trusted 18F26K22 you have suggested for my project last time.

Is there any quick way to check whether the RFM module is powered up? Like to send a signal from the Master (PIC18F26K22) and at G0 of the modules port to connect and LED indicator. How may i know that the module is powered up?

[astanapane]

I did the simplest configuration connection between the PIC and the RFM69HCW.

Both of the boards are exactly the same. One will be the TX and the other will be the RX.

Still in a very early stage, and keep reading the SPI protocol.

[richard]

Is there any quick way to check whether the RFM module is powered up?

read a register on the module . write a new value to that register read the register again and confirm the new value


looking at your picture there are two wires missing on each module , that's never going to work

[Ioannis]

SPI is not RS232. Sure Richard spot it. You need to revise your connections.

Also, your caps around the crystal, what values are?

Ioannis