I am confused; if I scan for Bluetooth devices and get the RSSI, I get the same RSSI with or without the external antenna connected.

If I scan for Wi-Fi devices and get the RSSI, I get at least 3dBm lower with the antenna connected e.g. -48dBm V -52dBm.

I have repeated these tests on a second ...

Further research indicates that the external antenna is already selected automatically.

So, I am mystified as to why can I receive Bluetooth signals without an external antenna connected, but connecting an antenna makes no difference to the received signal levels?

Hi Lichurbagan

My ESP32-S3 UNO board has a U.FI connector on the chip.

See image on this link https://en.paradisetronic.com/products/ ... kompatibel

Thus I assume a connection to an external antenna is available.

I have a ESP32-S3 UNO with a ESP32-S3-WROOM chip.

If I run a Bluetooth scanner I get the same RSSI with and without the external antenna connected.

Is the chip connected to an onboard antenna? If so how do I activate the external antenna?

Hi Lichurbagan

Good News

I uploaded the main.ino sketch to ChatGPT and requested it to modify the code to remove MQTT and Platformio features. Then modify to show device readings on the serial monitor.

And, it worked! Although I had to change the UUIDs.

I did try a modification to also use ATC ...

Hi Lichurbagan

Thank you for your response.

I had not unpacked the zip correctly.

However, this looks too complex.

As I said in my post, I am looking for a simple script that puts the readings out on the serial monitor.

I can the build from there.

Kind regards

Hi Lichurbagan

Thank you for your response.

I was looking for a vanilla script that just puts the data read out on the serial monitor.

This is targeted at MQTT and Platformio.

However, I tried to adapt it, BUT there is an #include <userconfig.h>; this generates :- Compilation error: userconfig.h ...

Hi

I am looking for help in collecting LYWSD03MMC data via bluetooth using a ESP32.
The LYWSD03MMC is the Mi Temperature and Humidity Monitor. I have the original version.

I can see the devices using a basic Arduino bluetooth scanner sketch.

However, I cannot read the data.

I have even flashed ...

Hi @Sprite

Yes, my board is like the that one, but with a 16 pin CH340.

I implemented your second fix of soldering directly to the CH340.

Fortunately I had a USB breakout board in my 'goodie box'.

I did however, find soldering difficult; it was so easy to create a solder short between adjacent ...

Is it possible to program a ESP32-S3 via the Rx &Tx pins?

I have a ESP32-S3 UNO and the USB connector has come off!

I have tried to reattach it, but to no avail.

The reason it became detached is due to the poorly designed mechanical fixing of the USB-C connector.

It is soldered to the board, BUT ...