Hi guy’s
I want to use a RFM69CW in combination with a RFM69pi V3.1 but i can’t find the layout for this.
the only layout i have is a combination with a RFM12B
found on this site
The RFM69CW and the RFM12B are physically pin-for-pin compatible. The software is NOT however the same.
Hi Robert
Is this realy? i compare the data sheet but it is not the same i think
RFM12B
RFM69CW
Yes, sometime ago several OEM devices were swapped from rfm12b to rfm69cw by simply changing the firmware (and rfm module), no other physical changes were required. Are the datasheets you have correct? Have you checked multiple sources?
I didn’t write “identical”, I wrote “compatible”. Some of the '69 pins can be used for multiple functions under programmatic control. See section 5.3. Digital IO Pins Mapping.
It is confusing, partly due to the different signal names used. Dig down a level and look at the meaning/use of a particular pin and it is clearer. Then allow for the drivers not using or needing the full set of DIO pins anyway and it all hangs together - the same PCB footprint can be reused from RFM12B to RFM69CW. That’s what the C in the part number is supposed to flag i.e. the RFM69W is the same chip and support components but has a footprint incompatible with the RFM12 family.
Do you know which component’s i must use in combination with the RFM69CW?
| C1 | 15.24 | 27.22 | 0.00 | 22pF | C0603 |
|---|---|---|---|---|---|
| C2 | 9.33 | 27.22 | 180.00 | 22pF | C0603 |
| C3 | 26.67 | 9.83 | 270.00 | 10uF | C0603 |
| C4 | 26.23 | 4.11 | 90.00 | 0.1uF | C0603 |
| C5 | 18.48 | 26.27 | 270.00 | 0.1uF | C0603 |
| C7 | 24.64 | 17.95 | 0.00 | 0.1uF | C0603 |
| IC1 | 13.02 | 21.06 | 270.00 | ATMEGA168 | TQFP32-08 |
| LED1 | 26.67 | 16.49 | 270.00 | SML0603 | |
| R1 | 21.59 | 17.95 | 0.00 | 10K | R0603 |
| R2 | 21.59 | 15.92 | 0.00 | 10K | R0603 |
| R4 | 24.64 | 15.92 | 180.00 | 1K | R0603 |
| RFM69CW | 15.62 | 7.29 | 0.00 | RFM12B | RFM12B |
And for the atmega I see differend sketches with a 328P and not the 168
which one must i use the 328 or the 168?
I guess I don’t understand what you are trying to do - build a replica of an existing circuit/layout?
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Yes I am making a replica here