XM125 and the redboard. error: 7

Other
1

I don’t get it. this stuff is brand new, the xm125, the redboard, the cable. Example 01 of the xm125 works although the data produced is lousy. Now I want to run example 6 and when it runs I get this error: 7 and no data. Please advise.

15:48:32.339 -> 
15:48:32.339 -> -------------------------------------------------------
15:48:32.339 -> XM125 Example 6: Basic Distance Readings
15:48:32.339 -> -------------------------------------------------------
15:48:32.339 -> waiting 5 seconds.
15:48:37.340 -> go:
15:48:37.340 -> Starting Sensor...
15:48:37.340 -> 
15:48:37.666 -> Distance Detection Start Setup Error: 7
15:48:37.666 -> 
15:48:37.666 -> Distance Detection Started - range: 500mm to 5000mm (0.50m to 5.00m )
15:48:37.666 ->
2

Example 1-5 use the ‘presence detection’ firmware, 6-9 use the ‘distance’ version - check out the hookup guide for info on how swapping them works :smiley:

3

thank you for your answer. so I have to download a different firmware directly to the xm125 board?

4

Yep - that guide I linked walks ya through it, but essentially there are different firmware(s) differently optimized, and which one you’ll eventually use depends on the use-case

5

TS-Russell,

Thank you!!! I’ve got Example07 working just the way I want to now!
Onto the the next issue If I can trouble you. The code is written in a classic C++ class/method model, which of course, makes it virtually impossible to figure anything out. I can see I can get some data out of the sparkfun XM125 breakout board:

219
220 // Read PeakX Distance and PeakX Strength registers for the number of distances detected
221 radarSensor.getPeak0Distance(distancePeak0);
222 radarSensor.getPeak0Strength(distancePeakStrength0);
223 radarSensor.getPeak1Distance(distancePeak1);
224 radarSensor.getPeak1Strength(distancePeakStrength1);
225

But how do I just send a message and get a uart response of other data? There are 100’s of methods and I can’t find the tree in the forest.
I want to change the firmware in the XM125 chip, (I can build the .bin file now.) and I "~think~” I see where the XM125 chip responds to the getpeak0distance command:

835 static void print_distance_result(const acc_detector_distance_result_t *result)
836 {
837 uart_log(“%d detected distances”, result->num_distances);
838 if (result->num_distances > 0)
839 {
840 uart_log(“: “);
841 for (uint8_t i = 0; i < result->num_distances; i++)
842 {
843 uint32_t distance_mm = (uint32_t)(1000 * result->distances[i]);
844 uart_log(”%” PRIu32 "mm, ", distance_mm);
845 }
846 }

so now I want to see the actual message that the arduino receives so I can modify behavior.

for example in line 844 I want to change “PRIu32” to “hey look I changed this! PRIu32” and verify a round trip communication I can control. Any ideas or maybe help find the peak0distance actual code?

6

I’m not familiar with the code, but I’d recommend trying to enlist an AI like kimi.com to help navigate the intricacies…I’ve had a lot of success with that model and Claude.com

Let the AI know what you’re after and upload the file a a txt file and it should be able to get it going with your custom message etc