Check this comment out: https://www.esp32.com/viewtopic.php?f=13&t=37638#p126149 The problem is not the S3 and its BLE stack. If I run the use standalone BLE on the S3 I get a perfectly acceptable 3% packet loss. The problem is when I turn on esp-matter, then the packet loss jumps to 20%+, with some...

My goal is to send three ADV packets and get at least one of them 95% of the time. The sniffer sitting next to the S3 is dropping zero of these packets, the radios are only 40cm apart. I believe the high drop rate I am seeing is because the S3 radio is not listening to BLE when I send the packets. I...

I know it is a shared radio and it is going to miss packets, but is it possible to get sharing to a point where if I send a BLE packet three times 100ms apart it will get at least one of the three 98% of the time? Wifi is running in STA mode so shouldn't the wifi side have fixed timing windows where...

Next I started with the esp-matter/example/light code and added this file: #include <esp_err.h> #include <esp_log.h> #include <host/ble_gap.h> static const char *TAG = "ble_advert"; static void print_uuid(const ble_uuid_t *uuid) { char buf[BLE_UUID_STR_LEN]; printf("%s", ble_uuid_to_str(uuid, buf));...

Next I made a BLE only test program by stripping down the blecent example. /* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF li...

Changing intvl and window to 160 doesn't seem to have any impact. Average of 33 seconds.

Here's the periodicity of dropping packets. It is sending three packets once per second. These are the seconds when all three were dropped. First column is the seconds count, second is the delta seconds. The average delta is 25 seconds. Starts at 315. No code is changed from previous post. 325 377 5...

I have implemented esp_ble_scan_channel_setting() and verified that it works as expected. However, that does not seem to be the cause of my problems. If I set the sensor to Channel 37 and the S3 to Channel 39 I receive no packets, if I set them both to Channel 39 I see packets. Also note that I have...

So what is the best way to build a battery powered temperature sensor which connects to an ESP based device? The ESP device is mains powered and also on wifi with a small amount of traffic. My goal here is to minimize the number of packets the temp sensor is sending. If I use BLE advertising to send...

How do I control the advertising scan channels for numble ble_gap_disc() on the S3?

There appears to be an undocumented API in the ROM -- ble_ll_scan_channel_setting(). Is that what I want? What are the parameters? Why isn't this documented?