Examples Not Functioning as Expected or Crashing NodeMCU 1.0 (ESP8266) about arduino-dw1000-ng

[Sonic0]

Hi @jrstubbington,
We have used a very similar breakout board, so probably ok. The pinout is equal to ours, with a 10k pull-down resistor though.
Did you try other examples like StandardRTLSTag_TWR.ino and StandardRTLSAnchorMain_TWR.ino?
Use the latest code in Master branch.

[tisaia]

Hello @jrstubbington, aside from @Sonic0 suggestion, perhaps there's also another possibility in the ESP handling of interrupt?
I've tried to do some quick search and found that quite a few people have had trouble with "ISR not in IRAM" issue.
For example: https://forum.arduino.cc/t/using-interrupts-with-a-node-mcu/591995/4

[julianblanco]

Did you ever get this working? I had similar issues with rcv and send working but ranging did not

[Yashvardhan-A]

I was getting error in my program when i didn't use ICACHE_RAM-ATTR for interrupts.

As the line:
DW1000Ng::initialize(PIN_SS, PIN_IRQ, PIN_RST); uses the function
attachInterrupt(digitalPinToInterrupt(_irq), interruptServiceRoutine, RISING);
The function interruptServiceRoutine is called which needs to be in the RAM and not in FLASH and has to be manually defined by the user as per new update. So when you update the function declaration as
void ICACHE_RAM_ATTR interruptServiceRoutine() in the file DW1000Ng.cpp

the error is resolved

[Yashvardhan-A]

Hey @Sonic0 I have been trying to understand this library, coding is not my strong pursuit. The examples with interrupts are not working for me (I am using noeMCU1.0 and DWM1000). The other examples for anchors and tag is working as it doesn't incorporate interrupts. I wanted to know if you have any draft API for this library as that should make it a lot easier to implement programs. I want to calculate distances between modules with accuracy. Thank you

[Sonic0]

Hi @Yashvardhan001109,
I know, examples with interrupts don't work well. You can use the DW1000Ng::initializeNoInterrupt(<PIN_SS>) method without problems with NodeMCU1.0.
I think that programs implementation with DW1000 without minimum know-how isn't a simple goal to reach out to. In this library, there are all methods you need to create medium complex programs and DW1000NgRTLS abstraction (or single methods used) could be a good starting point. Probably, now (after 2 years) I would need a little time to understand what we did.
With the right setup and antenna calibration, you can obtain good accuracy of about 2/3 centimeters.