Questions tagged [ble]

Stands for "Bluetooth Low Energy." BLE (also "Bluetooth LE") is a variation of the Bluetooth wireless standard designed for low power consumption. It was introduced by the Bluetooth Special Interest Group (Bluetooth SIG) in December 2009 as part of the Bluetooth 4.0 specification.

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23 views

Arduino Mega 2560 + BLE HM-10 - I cannot execute AT commands

I have an Arduino Mega 2560 and a HM10 Bluetooth module (this one) I have connected the Bluetooth according to the manufacturer's specifications: VCC -> 5v GND -> GND TXD and RXD of the ...
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39 views

What are the Arduino hardware options for experimenting with IoT?

Just starting to learn about Arduino and IoT. I'd like to know what the Arduino hardware options are to try the following: Use FreeRTOS as SO WI-FI and BLE connectivity Solderless board Test OTA ...
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52 views

Arduino nano IoT antenna broke

I have an Arduino Nano 33 IoT and have used it for a good time now. I was using it when the antenna snapped off. Is there any way to fix it by either an external antenna or some other method? I tried ...
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Unable to correctly read CSC GATT data with ArduinoBLE on a Arduino Nano 33 IOT

I've set up a Nano 33 IOT as a central device and I'm attempting to read the data from a Cycling speed and cadence BLE device. The spec for the CSC Gatt service I want is: https://www.bluetooth.com/wp-...
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How can I rewrite my Bluetooth Classic Arduino code into Bluetooth Low Energy Arduino code (and have everything working the same)

My original code for BT Classic My Work in Progress BLE Code I am trying to take all I did in BT Classic and have it working exacly the same in BLE but the Rssi keeps returning 0's in the BLE code and ...
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How to use HM-10 as client, and send messages to specific services/characteristics?

I have been messing around with this module, unfortunately i bought a fake one, but got the original firmware running inside it (V550). So far i can set the HM-10 up as client/master and by using an ...
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Raspberry Pi 3B+ BLE communication to Arduino Nano 33 IOT

I have an Arduino Nano 33 IOT and it uses BLE. I want it to talk to my Pi 3B+ and send all of its sensor data. I cannot figure out a way to do it using Python for the Pi and ArduinoBLE library for my ...
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CC2541 Bluetooth AT Commands not work for any Commands sended from Serial

i bought the HM 10 Bluetooth controller (CC2541), i got connect on this device through Serial Bluetooth Terminal (Android App) with Serial BLE menu this method not requires any pass and "...
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Get client information on BLE

So I'm working on a personal project using bluetooth abilities to start a BLE server and want to automatically retrieve a client's information after it's connected: ID so I can keep track of clients, ...
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ESP32 BLE Send Receive Example

In my past projects I created tcp server-client architecture to communicate mobil apps. For instance, I created an AP on ESP8266, mobile phone connects to AP send some data then esp8266 send response ...
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123 views

ESP32 start BLE after deep sleep

I'm new to using the esp32 as a microcontroller. I'm currently working on a so-to-say remote control. Since I want to use the esp32 with an external battery I need to put it in deep-sleep after I ...
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139 views

BLE comunication between two ESP32s

how can i send data from one ESP32 to another with BLE? I was trying library from nkolban, but i didn't know how exactly should i write the code. All I want is to send a string with 5 characters. ...
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30 views

Sending Strings from NRF24L01 to app

I want to send pushbutton status from the nrf24l01 module to the app named nrfConnect. I could only find libraries that allow me to send float values. How could I send String values to the app? Thank ...
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42 views

Write a Struct using ArduinoBLE library

Hello I'm trying to send some Structs such as: typedef struct __attribute__ ((__packed__)) myohw_command_set_mode { myohw_command_header_t header; ///< command == myohw_command_set_mode. ...
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220 views

Antenna for ESP32-pico-d4

I am currently playing a bit around with the esp32-pico-4d, it does not have an onboard antenna, so an external antenna is needed, tho I don't know a lot about it so a little help would be appreciated....
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62 views

Arduino Atmega32U with nRF51 BLE by Adafruit limited to 5 second update rate?

Would like to ask for assistance with the code below. It's the Adafruit Bluefruit Atmega32U LE module with Adafruit's Arduino IDE example "heart-rate monitor" sketch. The code uses the hardware SPI ...
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44 views

HM-10 controller is not responding to AT commands

I recently purchased new HM-10 module, because old one was clone and it lacks AT+TYPE command. I connected it to my Arduino and I don't know why but I cant see any response in SerialMonitor. I even ...
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305 views

HM-10 BLE controller is not responding to some AT commands

I have HM-10 BLE controller and it is not responding to some AT commands which I need to use. AT commands which don't work: AT+TYPE2 returns +TYPE=0 AT+VERR? not responding AT+VERS? not ...
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55 views

Subscribing to Bluefruit LE Friend with ArduinoBLE not working

I've been using an Arduino Nano 33 BLE to communicate with my PC over the BlueFruit LE Friend's UART characteristic. Using the default ArduinoBLE library, I'm able to connect to the BlueFruit from the ...
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49 views

Bluetooth multithreading

I'm using my Arduino to make a speaker-like device. Instead of sound, it receives the beat of the song, thus the data comes in an array of floats. Each item in the array is a timestamp, an LED is ...
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675 views

Send/receive data from/to Raspberry Pi to/from Arduino with HM-10 (Bluetooth LE module)

My goal is to send a string from an Arduino via an HM-10 bluetooth module to a Rasperry Pi. I do this today by connecting the HM-10 on the Arduino to another HM-10 module (master/slave) and then from ...
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36 views

How to connect RedBearLab BLE shield (Or how to find Nordic_nRF8001.h)?

I am trying to explore the possibilities of connecting an Arduino to Phonegap/Cordova. I have a RedBearLab BLE Shield, which I want to test the connection with. My MVP would be to get the value of a ...
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313 views

Connect more than 4 BLE clients to ESP32 BLE Server

I want to create some buzzers connected via bluetooth for a quiz show. I got several ESP32. One of them is the master (BLE Server), the other ESP32s are the buzzers (BLE Clients) with one big button ...
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192 views

Error compiling for board Arduino Nano 33 BLE

I am trying to use pulse sensor with Arduino Nano 33 BLE sense, but when I verify it, it shows Error compiling for board Arduino Nano 33 BLE. The code is from the pulse sensor website. The code works ...
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564 views

Cheaper alternative to Arduino Nano 33 IoT with BLE?

The Arduino Nano 33 IoT looks great with its builtin Bluetooth chip. At ~€20 (Germany) it's pricey though and seems overkill for what I need anyway. What is a good, cheap alternative for a simple ...
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58 views

ESP32 WIFI and BLE power status

Regarding the esp32, I am wanting to understand a couple of things related to both wifi and ble power control. 1.) How can I do a status check on whether both the ble and wifi radios are powered/...
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56 views

How to quit flash mode on HM-10?

I have an HM-10 BLE module connected to Arduino Leonardo. It forwards UART from my computer: #define btSerial Serial1 void setup() { Serial.begin(9600); while (!Serial) { delay(50); ...
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162 views

HM-10 doesn't responde after RENEW

Today I finally got two HM-10 modules. I did flash firmware using this tutorial. It worked until I didn't send AT+RENEW command. Now, LED blinks, I see device in BT terminal(Android phone) but I can't ...
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32 views

How do I get my servo to turn using bluetooth, is this a glitch?

I'm very new to coding with arduino so please excuse my naivety, For an electronics assignment I am making a servo turn back and forth using a HM10 BLE however each time I press a button that sends '0'...
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531 views

Arduino MKR 1010 WiFi as BLE central/client

I'm trying to use my new Arduino MKR 1010 WiFi as a Bluetooth Low Energy central/client, however I could only find information on how to use it as a peripheral/server (for example with the ArduinoBLE ...
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304 views

esp32 and the esp32-cam (agoal)

Is it considered possible to use the esp32 code on an esp32 cam board? Do they use the same hardware? I am having difficulty using this sketch https://gist.github.com/wybiral/...
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102 views

BLE splitting string data

I am working with BLE 4.2 (ESP32) that sends IMU (accel, gyro, mag) data to my mobile app (Android). Unfortunately, I can send only 20 bytes in one packet. This is the code I have: (I am connecting ...
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276 views

How do I send non-ASCII keys over the BLE HID connection using an Adafruit nRF52 Feather?

The hid_keyboard example sketch shows how to send ASCII characters, but how can I send non-ASCII codes like the F1 key, or keys with shift/control modifiers?