💬 Arduino Pro Mini Shield for RFM69(H)W

[Cliff Karlsson]

So what is the easiest way to correct this if the previous PCB is used? Can I change in the sketch so it works anyway or do I need to solder some wire?

[NeverDie]

@Cliff-Karlsson
I suppose setting Pin 4 to INPUT after running a wire from Pin 4 to Pin 2 would patch it. Or you could solder bridge between 2 and 3, and then solder bridge again between 3 and 4. In that case, you'd set both Pin 3 and Pin 4 to input, assuming they weren't being used for something else.

If you have the boards but haven't yet soldered the headers, then I suggest doing the solder bridges, but don't connect header pins to pins 3 and 4. Then there's no need to set pins 3 and 4 to INPUT. I think that would be the cleanest fix.

That said, if the firmware you're running isn't relying on interrupts, then no patch would be needed. For instance, I had previously tested the PCB using lowpowerlab's node and gateway example code, which doesn't use interrupts for send and receive. That's why I didn't notice the bug until it was pointed out by Korttoma.

[NeverDie]

Also, I shrunk the board a little bit in Version 15, so it should cost less to get fab'd. On OSH-PARK, for example, it would now cost exactly $4 for 3 boards.

[NeverDie]

For some reason the Version 015 files disappeared after I posted them. So, I re-posted them this morning. Hopefully they stick this time.

[andre_x]

Hi guys!
Thanks to NeverDie, I've just received my first batch!
Can anyone post the code for the board with the sensor?
Thanks!!!

[andre_x]

THAAAAAANKS!!!

[gohan]

@andre_x it is pretty straightforward, there are already examples rfm69 examples around the forum: it's basically the node example sketch with added sensor library and a few lines of code to read and send temperature/humidity

[jeti]

Hi Guys,

I am having troubles with the Version 015 ( i have checked that DI00 is routed to PIN2).

My definition for the radio looks like this:

// Enable and select radio type attached 
#define MY_RADIO_RFM69
#define MY_IS_RFM69HW
#define MY_RFM69_FREQUENCY RF69_433MHZ

but i still get a error:
!TSM:FPAR:FAIL

Adding a capacitor did nit help either. Does someone have a similar Issue?

Thanks

[pepson]

Hi
Is any chance to also project it for Arduino Pro Mini but for version 5V ?

[gohan]

@pepson I guess not since it would need a logic level converter if you don't want to fry the rfm69 module

[pepson]

But it is not only other voltage power ? I use it on my Arduino Pro Mini 5V and use reduce power from 5V to 3,3V by stabilizer... But i use version 5V because i use it with sketch to control relay...

[gohan]

read rfm69 datasheed, the pins can only take up to 3.6V, they are not 5V tolerant like the NF24

[pepson]

Yes
But i reduce power from 5V to 3,3V by AMS1117

[gohan]

I'm not talking about vcc, I'm talking about data pins

[scalz]

@pepson
if your arduino VCC is 5v, then arduino SPI lines are running at 5v and sending 5v to RFM69 SPI pins which is not ok. like gohan said, you need level shifter, or use a 3v arduino pro mini

[pepson]

i use it on arduino pro mini 5v and works ok. no problem. Also use RFM69HW on RPi3 and also works ok.
When i use on Arduino Pro Mini 5V i can not use RFM69HW with AMS1117 ? Radio will be destroy after some times ?

[pepson]

Also on mysensors show how connect it to Arduino 5V
https://www.mysensors.org/build/connect_radio

[zboblamont]

@pepson "NOTE: The NSS, MOSI and SCK are not 5V tolerant on RFM69. You will need to use a level converter if you're using a 5V Arduino."....

[pepson]

Ok but why nothing is describe on MySensors on page where show how connect radio ?
But i have connected and works ok 5V without logic level converter...

If i not use this logic level converter what will be happen ?
I can use this https://pl.aliexpress.com/item/8CH-IIC-I2C-Logic-Level-Converter-Bi-Directional-Module-DC-DC-5V-to-3-3V-Setp/32238089139.html?spm=a2g17.search0104.3.299.voV8Dr&ws_ab_test=searchweb0_0,searchweb201602_4_10152_5000015_10151_10065_10344_10068_10342_10343_51102_10340_10341_5130015_10084_10083_10304_10307_10301_10312_10059_10313_10314_10534_5790011_100031_10604_10103_10594_5060015_10142,searchweb201603_32,ppcSwitch_4&algo_expid=1efe59eb-1872-47dd-8d87-8a30137c624f-24&algo_pvid=1efe59eb-1872-47dd-8d87-8a30137c624f&rmStoreLevelAB=5 ?

[scalz]

@pepson
You're messing things, you should recheck.
zboblamont extracted the note exactly from here https://www.mysensors.org/build/connect_radio
If you check the rfm69 section, then you'll see it's not 5v tolerant. You can also check min and max input voltage in rfm69 datasheet if you need.
In the above link, it is not mentioned that it is using a 5v arduino (i agree the regulator on the pic can be misleading, but there is the note..).As there is no level shifter on the pic, you should consider it as 3v arduino with use of additional regulator in case the arduino is not beefy enough for the radio module.. :)

On your rpi, do you connect the rfm69 vcc to 5v rpi? I don't think so, or you'll fry your radio.. And the Rpi GPIO are 3v, not 5v. So no problem for the radio spi.

3v arduino mini pro has a regulator to convert 5v input to 3v for atmel. So on these boards, the atmel vcc is 3v, and signals too. To not mess with 5v arduinos, which are running full 5v.

I guess these level shifter should work, I have no xp with these. And generally prefer to go simpler, without levelshifting.