Esp32 bluetooth problem. Guide on how to allocate the .

Esp32 bluetooth problem Espressif Homepage; Aug 18, 2018 · Reboot the ESP32 to turn on Bluetooth with that name. Sep 27, 2018 · Espressif ESP32 Official Forum. These assignments are easy changed within the Setup function of the main arduino sketch, and can be reconfigured on the fly. Aug 15, 2018 · I tested the BluetoothSerial example on my ESP32 dev board. There is also a setDelay method to set a delay between each key event. 4ghz spectrum 5. to pair my Bluetooth esp32 device. The ESP32 is a low-cost and low-power microcontroller that has integrated Wi-Fi or Bluetooth capabilities. Here is my config for my esp32 woorm-32d It is on my wireless… Jun 1, 2024 · ESP32に搭載されているBluetooth（SPP）を使用してパソコンと無線通信してみます。 既存の有線シリアル通信をほぼそのまま無線化できるのでかなり簡単にパソコンやスマホと無線することができて便利。 Connect the OLED display to your ESP32 board according to the manufacturer's instructions. Contribute to smoochiee/Bluetooth-jammer-esp32 development by creating an account on GitHub. This article will show how to interface the ESP32 with Bluetooth and control any application. Solution: Double check if Bluetooth initialization was added in setup(). This is what I see when I go to the bluetooth and other devices settings in Windows 10: Bluetooth jamming esp32 with nrf24l01. :: The RaspberryPi sits in my main stereo inside a chassis (picture shows my testrig, not my main stereo) and it keep's loosing connection when remote goes + 1-2meters away or so. The back view, displaying the battery and other ESP32 Bluetooth Events CallBack Function. This repo hosts known, tested devices that can serve as Bluetooth proxies for Home Assistant. The code. As of version 6. hema shree Posts: 1 ESP8266EX and ESP32 are some of our products. Download Arduino IDE here Also remember to install ESP32 to your IDE and all the prerequisites. I paired my andoird with esp32 bluetooth first time. Thank you for providing this information and for all of the good work. Wifi deauther single and deauth all 3. Oct 24, 2024 · Using a Bluetooth proxy eliminates the need for your PC or server to have its own Bluetooth adapter, allowing you to leverage the ESP32 for Bluetooth functionality and reducing hardware dependency on your primary machine. 3 and homeassistant core to 2022. This setup is ideal for remotely controlling hardware components connected to the Slave ESP32. Jul 16, 2019 · I am using the ESP32 to communicate with my Windows 10 PC via a Bluetooth classic SPP profile. Mar 7, 2024 · Bluetooth Connect esp32 to odbd2 problem. begin(115200); // Start the hardware serial port SerialBT. SDA/SCL on d22 and d21; Upload the code to your ESP32 board using the Arduino IDE. Reset device, and in the same moment, click it in windows pairing window. Thanks for all brilliant people who saved my hard work done by providing this solution. You might also ensure that the phone software is kosher for BLE operations. Nov 3, 2023 · But in my car related project to send info back to my lab via the internet, I decided to use only one ESP32 with the LCD screen (TTGO-T1) because of the space constraint. Nov 27, 2020 · Hi, I've been running into the same type of issues with these boards (I tried with 2 of them), using Arduino 1. Enable Bluetooth modem sleep with external 32. Using Arduino. When the listpicker is selected, the phone display turns black but does not reveal any other bluetooth Aug 3, 2024 · As was mentioned multiple times, if you are overriding version, you are on your own. firing a clock every 1 minute and do a BT handshake between app and ESP (for example transmitting one character from the app to the ESP and visa versa) ? ESP32 is a series of low cost, low power system on a chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth. I have two esp32 boards, one Esp32s with ESP32-D0WDQ6 chip (revision 1) and another Esp32 DevKit V1 with ESP32-D0WD-V3 chip ( revision 3). After un-checking "Include GATT client module (GATTC) (NEW)" and rebuilding my project didn't crash anymore. 5, reWASD supports ESP32 Bluetooth connections. Aug 28, 2020 · digidax changed the title Using MAC address when connect to ELM327 via Bluetooth Problem with ESP32 to connect ELM327 via Bluetooth Classic Aug 28, 2020. 13 and Ubuntu. Just to troubleshoot the root cause, could you make your app to "stay alive" i. However, by modifying the code so that it is in "Send data via Bluetooth and not occupy the TFT screen" mode, the connection with the ESP32 via Bluetooth IS POSSIBLE! Jun 1, 2024 · Espressif ESP32 Official Forum. Start playing music and the track and artist information should be displayed on the OLED Mar 17, 2021 · The problem is: The app connects to the ESP32 without problems. Instead of polling for various Bluetooth events and keeping the CPU blocked waiting for some data to be received, a connection to be closed, or any other Bluetooth event, we can instead use the CallBack Function to get a notification when any Bluetooth event takes place. I Just got a Heltec V3 and I have a couple issues going on. h> #include <BLE2902. Firstly, I connected the ESP32 to 2 different Laptop and it worked. The node won’t show up once connected to the computer to flash firmware. Mar 18, 2023 · Hello, it´s the firt time that I write here. When you want to use WiFi, you need to stop Bluetooth and vice versa. Mar 7, 2019 · Hardware: Board: ESP32 Dev Module Core Installation version: na IDE name: Arduino IDE Flash Frequency: na PSRAM enabled: na Upload Speed: 115200 Computer OS: Windows 10 Description: Hi, I programmed the ESP32 with Arduino IDE. Sep 29, 2022 · Hi to all friends here. Got a data cable on Nov 3, 2021 · I'm trying to use ESP32 to send receive/send data (RFCOMM) through bluetooth to Windows 10, I've already tried with both classic and BLE bluetooth, but despite what I do, Windows 10 won't recognize ESP32 as a Bluetooth device. Rescan for new device then click on the my esp32 device Here m the miracle happened . The received data from ESP32 is 800bytes. This seems to work for a while but, usualy after 1 or 2 Thingspeak updates, i can't reconnect to bluetooth. I am using the library "BluetoothSerial. The ESP32 microcontroller transmits sensor data to the client device and receives control commands from the client. Unfortunately, the AppInventor application appears to use a BLE extension (20201223) that was specially built to work around an issue. Solution for problem 1. However, you may occasionally encounter connectivity issues while working with ESP32 Bluetooth serial. It should have bluetooth on most of the time for connection with phone app (MIT App Inventor), Every half hour it stops bluetooth, starts wifi and sends data from DHT22 to Thingspeak. You might check the Martyn Currey website for BLE-specific information. May 10, 2019 · Now I have a problem, I explain: I have the esp32 working with dual core, core 0 will communicate through uart1 with a GPS board, and core 1 will communicate throuht bluetooth, but when the bluetooth works there is not communication with the GPS, and when there is such communication with the GPS then the bluetooth does not work. After this is done, stop wifi and restart bluetooth. find device in list. Increase transmit power if Oct 30, 2023 · Hi there, I have made a simple water timer. I have two Tbeams that were very easy to set up and flash. However, after a 100 bytes or so, the connection freezes. However, I get problems using the Bluedroid BLE Stack : At beginning I just wanted my device to advertise. I checked the adf getting started guide, I have already opened the PSRAM support relatively, I believe this is not a problem of insufficient memory, it should be related to the opening of wifi, when I turn on wifi, Bluetooth connection, wifi will be disconnected. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers. However according to ChatGPT that is "odd". 1 december version esp32 wrover devkit v1. Serial. It was working fine but when i use bluetooth, one Oled which is connected to GPIO pins 01 and 03 is not working and other 4 Oled are working. To simplify things for testing I had ChatGPT write this code for just connecting to Bluetooth. 4, so C6 is not officially supported as it needs IDF 5. Feb 17, 2020 · adc reading, stay fix in randon value, if i deactivate bluetooth, then adc via i2s, work fine, any idea? i use Esp idf 3. 0b2 What type of installation are you using? Jan 17, 2023 · The problem is that if I want to connect to the ESP32 via Bluetooth while the TFT screen is graphing, THE CONNECTION IS IMPOSSIBLE!. 0. 1 this is the code for i2s adc reading thanks in advance. ESP32BT is the Bluetooth name I used in this case. Here is a tutorial. Why it is happening? What may be the problem? I have shown pins that i have used for Oled (SDA , SCL) and Sensors (S0-S4) in image below. Any thoughts or suggestions are appreciated. txt file to ESP32 using a mobile application (Serial Bluetooth terminal) the complete 1KB data is not receive. h> #include <BLEUtils. ESP32 programming is done with Arduino IDE using C++. Jul 7, 2023 · Ensure that the antennas on both ESP32 modules are positioned properly and are not obstructed by any objects that may interfere with the signal. begin() it remains about 150k which means 60% of the RAM is consumed. The Jul 14, 2022 · I am working with an ESP32-S3-DevKitC-1 EVM and I would like to implement BLE stack. Whenever I send something to the ESP32 it processes it and then suddenly closes the Bluetooth Connection. I'm a novice in Bluetooth communication, but I'm not having many problems This project demonstrates a simple Bluetooth communication setup between two ESP32 devices, where one ESP32 acts as a Master and the other as a Slave. Search code, repositories, users, issues, pull requests Feb 9, 2022 · I use ESP32 BLE to connect with bluetooth devices. I'm using an ESP32 board from AZDelivery and trying to use the ESP32-BLE-Keyboard library, but the board wont connect with my PC and goes in a loop… Feb 17, 2021 · If i keep bluetooth code that oled wont work and if i again dump another code which donot include bluetooth program then all oled is working. THE PIN CODE AUTHENTICATION APPEARED . Connect the sensor to pin Obviously there is a problem- I do not understand the problem and am asking for help on correcting. Here is the code on esp32: Jul 2, 2024 · bluetooth audio transmitting problem. The code is at follows: #error Bluetooth is not enabled! Please run `make menuconfig` to and enable it. Them, I tried to connect to a PC using a bluetooth dongle, but I have a problem: windows requires me to confirm a pin on ESP32. Hi, I am trying to run through a bluetooth LE nimble example I have managed to get the SPP Server up and running but the SPP Client example header file asks for a #include "esp_central. Espressif Homepage; Jun 8, 2019 · I'm programming an ESP32 to accept Bluetooth commands and send Bluetooth Data back to my phone using the Serial profile. #include "BluetoothSerial. , smartphone). The ESP32 series employs either a Tensilica Xtensa LX6, Xtensa LX7 or a RiscV processor, and both dual-core and single-core variations are available. Grbl will now respond on either Bluetooth or Serial data. May 24, 2021 · I'm trying to connect my ESP32 devkit to Windows 10 using Classic Bluetooth. how my app supposed to work : open the app , choose bluetooth device to connect, after connection you choose a number (1-4) , the app sends that number through Bluetooth to the arduino program, reads it and then the program depending the number sends the sensors values (if you choose 1 you receive values for An ESP32 bluetooth audio receiver using a generic VS1053 breakout - GitHub - paulgreg/esp32-bluetooth-audio-generic: An ESP32 bluetooth audio receiver using a generic Espressif ESP32 Official Forum. h" which doesn't seem to exist anywhere? Dec 29, 2020 · Problem 1. Dec 22, 2023 · I want to transfer images over bluetooth using the ESP-32 module. Jan 12, 2018 · my andoird bluetooth mac adress is hard coded in esp32 file. I will try running nRF app to connect to our ESP32 device on the affected phones to see if the connection is stable. I previously used the HC-05 bluetooth module for providing Bluetooth tty access for interactions and programming; the ESP32, though, is only slightly more expensive and provides many features that the HC-05 cannot offer -- including that it itself can be programmed over-the-air to add your own features and functionality very easily. how my app supposed to work : open the app , choose bluetooth device to connect, after connection you choose a number (1-4) , the app sends that number through Bluetooth to the arduino program, reads it and then the program depending the number sends the sensors values (if you choose 1 you receive values for Feb 17, 2021 · Espressif ESP32 Official Forum. h> #include <BLEServer. 1, this is done by setting "Release DRAM from Classic BT controller" under Component Config -> Bluetooth -> Bluedroid Bluetooth Stack. I've added in support for microphone input and pulled the speaker output into the demo code so that it can be more easily customised. begin("ESP32_Test"); // Start the Bluetooth Oct 27, 2024 · Hello everyone, I'm working on an ESP32 project where I need to receive messages over Bluetooth, accumulate them, and display the complete message. In IDF v2. Apr 23, 2020 · I will try turning on verbose logging in the ESP32 bluetooth library to see if there are any useful messages. I do not seek a refund; consider this as my contribution to supporting your work. Which API to use for this? Sep 5, 2023 · Good evening. 4. 1 post • Page 1 of 1. I need to use serial Bluetooth over other suggestions like ESP-NOW or WiFi-Mesh because my ESP32 is talking to a standard OBDII Bluetooth dongle in the car. Hope that can solve the WiFi and Bluetooth issues. Aug 7, 2019 · With the below example, I can pair my phone to an ESP32. Aug 5, 2024 · I bought a NodeMCU Esp32, I tried to use the BluetoothSerial example to test it, but it did not connect, the following message appeared in a loop Sep 23, 2020 · Here is what you have to do in order to connect successfully. I have been trying to get the bluetooth proxy working and have had nothing but trouble. I was going to use the command 'ConnectWithUUID' in the BluetoothClient1. So the problem is that i have always a delay of about 1000ms when I send a message to the ESP-32 before showing up in the serial monitor. Apr 30, 2024 · Hi all, I’m fairly new to Meshtastic. what could it Feb 17, 2021 · Espressif ESP32 Official Forum. What could be the reason? If you want, I can also. Allow user to setup nrf24l01 module for experiment 4. PS: sorry for my english Sep 4, 2022 · The problem I have painfully connected a Fibaro FGBHS-213 with homekit controller using ble active proxy of my ESP32 device. - esphome/bluetooth-proxies Jun 28, 2024 · I am working on this project: The device is fully built, however I cannot get my ESP32 to maintain a bluetooth connection. Question 1 This project demonstrates how to establish Bluetooth Low Energy (BLE) communication between an ESP32 microcontroller and a client device (e. In your case, do it like: each XY milliseconds, disable bluetooth, start WiFi, send datas to Firebase, disable WiFi. Here is the answer from ChatGPT regarding this issue: I understand the Open Bluetooth setting in my phone , unpair esp32 device from my old paired list. Programming Questions. I have written an app using the standard beginners' bluetooth client blocks and am using an ESP32 at the far end. Guide on how to allocate the ESP32 Bluetooth adapter What is ESP32. As a first step, I am simply trying to send some random data over bluetooth serial. This is practical for sending over control and/or sensor values. 10. Regarding the new design featuring an external antenna, I believe it is a brilliant idea. Which will vary when multiple time data is sent through Bluetooth. I have previously paired the ESP successfully to the phone, using an Arduino code example and a bluetooth terminal so the hardware is confirmed to be working. All Bluetooth sends are echo’d on the Serial port if you want to watch the ESP32 is a series of low cost, low power system on a chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth. begin(115200); May 28, 2020 · If you haven't run out of phones, you might ascertain that ESP Bluetooth is working in the right mode, i. The Master device sends JSON-formatted commands to the Slave device to control various GPIO pins. I'll try and clean this code up further, but I would not recommend trying to use this code unless you really know what you are doing and know how to use the esp-idf Sep 29, 2022 · Hi to all friends here. 8. My FreeHeap is about 380k when running the Blink example After BluetoothSerial. h" BluetoothSerial SerialBT; void setup() { Serial. This project aims to provide file-sharing capabilities between the ESP32 Bluetooth and any Android/Linux device over their default OBEX protocols, something currently missing from the bluedroid stack bundled with the esp-idf. (very important) 5 device will now connect. Remove device from paired devices (if it's in there) 2. I am using bluetooth to connect esp32 to phone and read the output via esp32 bluetooth terminal which I downloaded from Google Play. Might be the cable. However, if the app is closed down, or the Bluetooth on the phone is disrupted then the app cannot reconnect to the ESP32 unless the ESP32 is reset. Sometimes it successfully connects, but after a couple of seconds it disconnects again and enters the same loop. Scan 2. Device used for coding: ESP32-WROOM-32D. Here is what i see using bluetoothctl. 1, even there were some changes made to support it. You don’t have to fiddle with drivers, compatibility bugs and similar issues. Pre configure attacks 6. Installed with no issues. (the esp32 device name is saved in the "paired devices" in my android tablet. This can also be used as a starting point/example for anyone trying to The default configuration assigns the Bluetooth serial stream to the KISS interface, and assigns the (USB) Serial device as the target for log messages. This interface type is useful for wireless applications within specified areas, such as household communication, any place with shorter-length communication, etc. But my esp32 module I coded does not connect to my device even though it is paired. The ESP32 has a few problems when you are trying to upload new sketches or install the ESP32 add-on. The problem is that when I exit the app it doesn't disconnect and when I try to search for the Blueetooh device again, it doesn't appear. Removing active o Mar 13, 2019 · I have been reading lots of Issues and it seems that there was a problem with some congestion event, but it was fixed some time ago. it works! But I use Serial. 3. Feb 1, 2022 · I am using an ESP32 to send data from Bluetooth. 4 What type of installation are you using Aug 27, 2020 · Hardware: Board: Joy-IT Node MCU ESP32 dev Board Core Installation version: 1. Thanks in advance. What I did- Went to Add ons in HA, installed ESPHome, Went to the Bluetooth proxy page, plugged in a QuinLED ESP32 board (normally used for running WLED) and clicked Connect. h", and I have problems with the interruptions. g. Copy link Sep 27, 2018 · Espressif ESP32 Official Forum. Some common problems and fixes: Problem: ESP32 not visible during Bluetooth device scanning. I eagerly anticipate positive updates from you. Aug 14, 2023 · I am using many ESP32 boards and like to use Bluetooth Classic instead of BLE. I then wrote a simple program on the windows side that tests the connection through the serial port. I'm working on ESP32, specifically it's an example that has an Arduino IDE, "BLE_multiconnect" with some changes. I think that i have de lastest version of the Arduino Core for ESP32. Apr 28, 2018 · I solved the problem : if you enable the Bluedroid in the esp-idf-template via make menuconfig, by default both GATT Server AND GATT client are enabled. This is after upgrading esphome to 2022. I am working with C++, so I have created a Bluetooth Task which should enable the BLE. properly set up to do whatever you intend. 1. 1) I have activated the Bluetooth using sdkconfig file. The goal is to simply gather data until a newline (\\n) character is received, then print the entire message to the serial monitor. The first question that i have is: When I send a message by bluetooth, the interruption triggers more than ones, and I cannot understand why. e. When connected via Bluetooth from a phone or another device, it allows you to stream music wirelessly. This creates a com port in windows. hello everyone, i'm trying to connect esp32 titigo Mar 2, 2020 · This application will let you to communicate with ESP32 via Bluetooth. The issues with the ESP32 modules are not your responsibility. I tried to test the device a couple of times to check the reliability. Jul 2, 2024 · bluetooth audio transmitting problem. h" //Header File for Serial Bluetooth, will be added by default into Arduino #include Aug 10, 2020 · You can NOT use WiFi and Bluetooth in same time. Then next time, it will be automatically successfully paired. Which version of ESPHome has the issue? 2023. If you already have all the “ingredients” above, then let’s get started. This works pretty good, i don't have problem with this, i adjust the code because i want esp32 always scan bluetooth when it lose the ESP32 is a series of low cost, low power system on a chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth. Currently esphome supports only IDF 4. h> BLECharacteristic *pCharacteristic; bool deviceConnected = false; float txValue = 0; const ESP32 is a series of low cost, low power system on a chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth. 9. Jun 20, 2023 · Hi @Peter_C, as Chris said, it could be the power saving feature that switches off the BT, therefore causing the ESP32 to disconnect after a while. Contribute to smoochiee/Noisy-boy-esp32-Bluetooth-jammer development by creating an account on GitHub. Alejandro. However, I keep running into issues: Data Fragmentation: It seems that Bluetooth data is being split or cut off Aug 22, 2021 · Hi everyone, i have a problem with a esp32 where i am using 3 libraries, bluetooth, wifi and httpclient. Regards May 4, 2024 · Troubleshooting Bluetooth Connectivity Issues. I compiled and downloaded the 3 BluetoothSerial sketch examples, and none of them worked with them. You have only one 2,4 GHz antenna onboard. It’s trying to connect WiFi not BT once powered up. This project features an ESP32 Bluetooth Speaker, which acts as an audio device. Grbl will send Starting Bluetooth:ESP32BT as the first item when booting to let you know Bluetooth is on. On your phone or computer, search for Bluetooth devices and connect to "MyMusic". getFreeHeap()) to check the memory usage, it consumes a lot of RAM. But I need the user to enter the passkey for pairing, which I can see in IDF monitor. Dec 26, 2023 · Hey Folks, I've been searching the web and this forum for an answer, but didn't find one. In factory state the ESP32 has limited memory to run a program. To allow your ESP to use our MQTT-program, its memory needs to be allocated again. Can you help me? I am following the instructions on this page: My code is: #include <BluetoothSerial. Try different orientations or consider using external antennas for better signal reception. h> #define ledPIN 2 BluetoothSerial SerialBT; byte BTData; /* Check if Bluetooth configurations are enabled in the SDK */ #if !defined(CONFIG This Code provides an example of how to send values larger than 256 between ESP32 and MIT App Inventor and a simple protocol is introduced to send over an ID with an associated value. The app is fully functional with no problems. Feb 14, 2024 · Statement of the Problem. I have used 5 Oled for displaying 5 different sensor values. The front of the Bluetooth speaker, showing the core components. i want to make an app to use it with my esp32 with Bluetooth. Then I delete the bluetooth device on my android tablet under "paired devices" list. KeeYees 2 Pack ESP32 Upgrade Mini WiFi + Bluetooth Internet Sep 3, 2022 · The problem uptime sensor doesn't usually go beyond 5-20 mins even with reboot_timeout: 0s on api. Sep 26, 2023 · The problem When I tried to enable esp32_ble_tracker in my esp32-c6-devkitc-1 board, I encountered some compile error, see the logs below. I am getting a BLE Sensor data, scanning the bluetooth and connecting with a service from this sensor, at the same time i'm connecting to my wi-fi house . My code is the following: #include <BLEDevice. May 11, 2021 · I am trying to connect ESP32 via bluetooth classic to my PC to transfer some data from a sensor. Feb 17, 2021 · Espressif ESP32 Official Forum. Oct 7, 2022 · 4. Please make sure that your ESP32 has integrated Bluetooth. 4 IDE name: Arduino IDE Flash Frequency: 80Mhz PSRAM enabled: no Upload Speed: 115200 Computer OS: Windows 10 Descrip Jun 15, 2021 · In fact the problem is in Bluetooth receive section, When sending 1KB of . You can use single or 2 nrfs Nov 30, 2019 · github-actions bot changed the title ESp32 bluetooth device can not be connected or discoveried ESp32 bluetooth device can not be connected or discoveried (IDFGH-2285) Nov 30, 2019 Copy link Collaborator By default the battery level will be set to 100%, the device name will be ESP32 Bluetooth Keyboard and the manufacturer will be Espressif. Jun 1, 2021 · This question was caused by a typo or a problem that can no longer be reproduced. How do I get it to connect to BT? It does not show up on the app. For this I'm using the Arduino Espressif Bluetooth Serial Library. Sep 4, 2022 · The problem esp32c3 bluetooth_proxy can't connet wifi, only stop scan on boot can fix but not everytime work Which version of ESPHome has the issue? 2022. I also want to have a unique UUID in all of my ESP32 so that my app will ignore other devices that do not have this UUID. janlucas23 March 7, 2024, 2:07pm 1. Extra. So, only those who know the key can pair to the ESP32. Mar 7, 2024 · I am using esp32 dev kit with wi-fi and bluetooth features in this project with MAX30102 pulseoximetry sensor and electrical stimulation electrode. But the passkey is shown to the user at phone's end and the user just has to click OK for pairing. Set Up Materials All On The Project Board Oct 17, 2016 · It is possible to release some of the RAM used by the Bluetooth stack if running with BLE only. 3. ESP32 is a series of low cost, low power system on a chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth. go to add device and select bluetooth. :: I have another ESP32 connected to my RaspberryPi. I am working on an Android application to communicate with an ESP32 as a GATT server. Bluetooth jammer Can set channels to attacks 2. I am the only one with this problem? And the other question is (and the most important for me), does someone know how to Oct 22, 2020 · This is an excellent tutorial on the topic. println(ESP. My problem is that the device does appear in the Android Bluetooth list, but it does not appear in iOS. 768kHz crystal as low power clock: [*] Bluetooth modem sleep [*] Bluetooth Modem sleep Mode 1 Bluetooth low power clock (External 32kHz crystal) and add xtal 32khz to GPIO15, 16 with 12pF capacitor, 5MΩ, 0Ω registor. With this setup it's working much better and the range is around 10 meters now. zryqmv ucuvqgl xdc jchj hktskve rffj waog gzdi oexdh utgxrm