MDBT42Q NRF.setScan not detecting BLE Advertisements

[markjlascelles]

Hello,

I have my PC connecting to an MDBT42Q Breakout via a CP2102.

I've upgraded the MDBT42Q to 2v27.

I want to detect BLE advertisements from other devices so my code is the below, that is simple as I can think of. I upload to RAM via the Espruino IDE and all seems to start correctly and I can see the logging.

But all I ever see is "Invalid device..." - even when advertising with nrfConnect, or BLE Advertiser (both android apps), or my watch, I never see any devices recognised.

Any ideas welcome.

Regards,
Mark

console.log("Starting BLE advertisement scan...");
NRF.setScan(function(adData, device) {
try {
if (!device) {
console.log("Invalid device data received at time: " + getTime());
return; // Skip processing if device is undefined
}
console.log(device.address);
console.log(device.rssi);
} catch (e) {
console.log("setScan error: " + e.message + " at time: " + getTime());
return;
}
}, {
active: true,
interval: 625,
duration: 10000,
window: 625
});
console.log("BLE scan initialized successfully");

[gfwilliams]

Where did you get the code from? I guess an AI wrote that for you?

If you look at https://www.espruino.com/Reference#l_NRF_setScan it's not how you use setScan.

Probably all you want is:

NRF.setScan(function(device) {
  console.log(device.id);
  console.log(device.rssi);
});

Depending what you're after you might want NRF.requestDevice (find one device) or NRF.findDevices (scan for X seconds and return what was found). setScan will call you back every time an advertisement is received, which could be a lot!

[markjlascelles]

Thanks - it was indeed AI generated. Not sure why it thought I wanted an active scan - and the signature seems wrong.

Changed to NRF.setScan(function(device) {

And passing in interval and window only, seems to meet my requirements.

Thanks for your help.