JeeLabs Café

What happens when you use the ‘t’ command?

It is also worth making sure that “#define DATAFLASH 0” is set rather than the default “#define DATAFLASH 1” in the RF12Demo sketch for the Arduino. The Jeelink has data flash so it is fine on that sketch.

Thanks very much for your help.
I changed DATAFLASH to 0
Here is what happens when I type the t command (didn’t get an ack :
<pre>
> 0t
test 0
> 66 b
> 0t
test 1

Hi sketchy,

From what I understand you have attached a JeeLabs RFM12B board to an Arduino. You
could give this is try.

  Arduino                     RFM12B board

  dig 13(SCK)                    SCK
  dig 12(MISO)                   SDO
  dig 11(MOSI)                   SDI
  dig 10(SS)                     SEL
  3V3                            3V3
  GND                            GND
  dig 2(INT0)                    IRQ

good luck!

It also just occurred to me that you are using an Arduino, therefore 5V, not a JeeNode 3V3.
Therefore try the previously suggested wiring setup but change the 3V3 connections on both
boards to 5V. Also you will need to have the 3x 4k7 and 3x10k ohm voltage divider resistors

cheers,

Probably should also have mentioned that you will also need to install the extra caps
and 3V3 regulator on the RFM12B board to operate from a 5V Arduino… wonder what else
I have forgotten? Attaching a photo of an Arduino RFM12B board setup from several years
back. Should be helpful connection-wise.

If you are happy with your 3v3 set up then can you load RF12Demo on both units at the same time. Use the ‘t’ command on each node to verify the radio paths. If this works need to take a look at test1.

Thank you all VERY MUCH. I loaded RF12Demo on both. I also added a few additional Serial.println() on the Arduino Uno + RFM12B Board setup. I consistently get:

Current configuration:
_ i31 g100 @ 868 MHz
—>after rf12_canSend CAN NOT SEND

While I have soldered a bit, I am fairly new to it. I have attached images of my soldering. Also, is there a way to use a multimeter (or other device) to see exactly where the circuit is breaking?

Again, THANK YOU.

Your soldering isn’t too bad although Rohan will be appalled - Rohan is Martyn’s son and a wiz with a soldering station.

If you are happy to, can I ask that you load the RF12Demo while only changing “#define DATAFLASH 0”. With a terminal session connected to both running versions of RF12Demo and capturing output. Then press the ‘?’ once on each and follow up with a second or two of ‘t’ command. Then post the two output files that you captured.

Hmmm.. a couple of “dry” joints visible but more significantly, ANT // Vdd on the RFM12B module appear shorted. Worth a touch up with solder braid, but may prove to be terminal.

I included a screen snapshot of two terminal windows - AD01DTYI > JeeNode USBMODEMFD111> Uno + RFM12B
(note: I usually open these using applescript. I spent a bit trying to figure out how to get script command to save the input/output in text..but it’s going to take me more time…so sending the image…besides not sure this is what you meant?

Regarding my soldering skills - I agree they are appalling. I will continue to practice. I will get to “good enough.”

Again - MANY THANKS. I really want to know what I am doing wrong (?)

The left hand looks reasonable - as far as we can see with nothing to receive its signal - if it is able to send one.

The right hand unit is our first problem, do we have photographs of this unit? Have you been able to tidy up as per Martyn’s advice? I think there are additional soldering problems than Martyn has highlighted - can you have another go at each of the RFM12B connections and remove any shorts?

Well…YIPPEE! A HUGE thank you to you both. I removed solder that probably caused a short between ANT//VDD and I added solder to one of the pin holes that looked “dry” (one of the resistors)….

and it seems to work. I included an image of the results I got.

Again - thank you. It is very important for me to learn from my bumblings. I have learned a few things from going through this. Perhaps the standard one applies - don’t give up :-)…(no matter how foolish I feel!).

Kind regards!

Well done, perhaps I can now ask why you selected the same node number for each node? Ah, and 31 is a sort of special function node number too. No matter, you got away with a few indiscretions and all is well - enjoy.