Questions tagged [bluetooth-low-energy]
Bluetooth Low Energy ("BLE") is a radio standard for wireless personal area networks, introduced in 2006. Bluetooth Low Energy is a subset of Bluetooth v4.0.
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Sparkfun Artemis Nano keeps dropping BLE connection and doesn't notice it isn't connected anymore
I'm working on a device that uses the Sparkfun Artemis (specifically the Nano at the moment) to count the number of times a wheel spins, using a UART based proximity sensor. The device is meant to ...
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What's the meaning of RF power consumption given in mA, not in mAh?
I'm trying to understand the power consumption of an esp32 with BLE enabled and transmitting. Its datasheet provides the following table:
As you can see, it provides the power consumtions in mA. I ...
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How can I make a basic BlueTooth communication between a cellphone and MXCHIP EMC3080-P module?
I'm trying to use the EMC3080-P module from MXCHIP, because it's used in some applications from ST, the company where I had the microcontroller I'm using (for example, the B-U585I-IOT02A discovery kit ...
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How to access Bluetooth LE features of CYW43439 on Raspberry Pi Pico W?
Raspberry Pi Pico W comes with a chip, CYW43439, that is capable to do WiFi and Bluetooth (both Classic and LE). According to Chapter 2.1 in Raspberry Pi Pico W:s datasheet, GPIO24, GPIO25 and GPIO29 ...
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BLUENRG-LP BLE Antenna Design Query
I am developing a small Bluetooth Low Energy product using the BLUENRG-LP series of SoC from ST Microelectronics. For the RF matching part, I was told on their forum to just copy the design in their ...
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What's the best RF scheme and chip for my project?
I'm making a little scanning beacon gizmo. When a laser shines on it from ~40m away, it is supposed to transmit its ID and HIGH (1) to the laser controller ~40m away. Otherwise, transmit 0 or nothing. ...
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Bluetooth trilateration using nRF5340
I am a total beginner in working with RTOS and Zephyr and nRF devices. I would like to build a Wireless Sensor Network which consists of 3 nodes (maybe set in a Bluetooth Mesh) whose primary objective ...
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ESP32-C3 Picoclick C3 missing component
I'm putting together a small PCB.
It's based on the open source Picoclick-C3 by the fantastic maker MoeKoe:
https://makermoekoe.gitbook.io/picoclick-c3/hardware
In the part of the circuit for the wifi ...
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NRF52 - unexpected high power in idle mode
I am trying to program a low-powered Bluetooth Low-Energy sensor using an nrf52810 microcontroller. I am trying to minimize power consumption when the sensor is idle. I have created a minimum code ...
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ESP32 BLE Bluetooth Serial to Hardware Serial Bridge
I'm looking for a way to use serial devices with my iOS iPhone without buying a $20 device.
I have an ESP32 which can do Bluetooth Serial to Serial using this code but if I replace the Serial with <...
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Implementation of microsecond timer on NRF52832 using sandeepmistry nrf52 library
Can anyone please describe how to use sandeepmistry nrf52 library to create an accurate microsecond timer, without using any standard delay functions.
I'm using the timer on a generic nrf52832 design ...
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What could be causing ESP IDF to not recognize the content of my included header files?
ESP - IDF not functioning as expected. I've been trying to work on esp32s3 and skainet using esp-idf(ide not the eclipse or vs code plugin) and I am facing this issue constantly. Issue: I have made a ...
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Flashing of ESP32-C3-Mini
I have made a circuit to flash the ESP32, I have followed the circuit in the Devkit but still have some questions regarding that. Can you please have a look and let me know if there should be any ...
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Repurposing NRF52810 based iBecon / Click device
I have a leftover device that was used to unlock my doors. Since the membership is terminated, It was laying around for some time, so I thought to open it up and saw following, It almost look same (as ...
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is Bluetooth SIG registration required?
I'm using a Bluetooth module that is certified and meets all needed regulatory requirements. I tested my end product for all the EMC requirements. I do not care about using the Bluetooth Logo. can I ...
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WT901BLE not showing/advertising service UUID to the ESP32
We are pairing WT901BLE device with the ESP32.When WT901BLE is paired with smart phone application Reconnect then service UUID is shown. I have read on some forums that some devices don't advertise ...
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How to implement NRF52840 BLE DFU using Zephyr RTOS?
I am using Zephyr RTOS to run an NRF52840 module using NRF Connect SDK V2.2.0. Can anyone please indicate on how to implement BLE DFU with Zephyr. My current application already has BLE read and write ...
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ESP32-S3 BLE multiple servers connect to one client at a time
I am working with ESP32-S3 module on Arduino IDE.I need to connect to multiple BLE servers to one client and able send and receive data from client to all servers at a time. I tried connecting ...
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ESP32-S3 BLE MESH with Arduino IDE
I am working with ESP32-S3 on Arduino IDE.I want to implement BLE MESH network with four ESP32-S3 boards. But I didn't find any examples to implement BLE MESH on Arduino IDE. Can anyone suggest how to ...
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Could I program my own application firmware on a certified BLE module?
I want to send some data which I get from a sensor with I2C over Bluetooth LE.
Is it possible to bring my own application which reads the sensor data together with the BLE stack onto the certified BLE ...
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NotImplementedError: in FeatherS3 - ESP32-S3 Adafruit (BLE HID)
I am trying to upload a BLE HID code to FeatherS3 - ESP32-S3 Adafruit and get a NotImplementedError.
I have no idea how to proceed forward. Please help me on this. This code works perfectly on a NRF52 ...
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BLE HID Keyboard Device for iOS
I'm using a Dialog SmartBond DA14531 as a BLE HID Keyboard device. It works on Windows but not on iOS. Although it pairs successfully, the HID key events do nothing. Does anyone have any experience ...
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BLE in STM32WB does not work on a custom PCB board. How to check where the problem is?
STM32 - STM32WB55CGU6
Antenna - 2450AT18B100E
Filter - MLPF-WB-01E3
Please help me fix the problem with my custom PCB board and BLE. The antenna on the board won’t work (I don't see my device via ...
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Feedback on PCB-layout wanted
I'm currently making a weather station as a personal project. It will consist of one BLE peripheral and one BLE central. I will fabricate both as one PCB, and panelize them with a vcut.
As mentioned ...
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How to install BLEServer.h and AVRdude.h
Chatgpt suggested the following code to upload for my Blend Micro to advertise it as a peripheral. However, I do not have the BLEServer.h and AVRdude.h packages installed. Could anyone help me install ...
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Implementing nRF52840 as modem only
I do a lot of embedded electronic design with a handful of microcontrollers, and I want to make a variant of an existing product of mine a Bluetooth LE central device so as to talk to some specific ...
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BLE Sleep and Rx Mode
A Generic Tx Node:
Cycle time - 5s.
Tx Time (wake up, Tx, Sleep back) - 0.1ms -> current consumption 30mA.
Actual Sleep Time (some sleep mode)- 4.9ms -> current consumption 20uA.
However for a ...
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Taking a BLE product to market utilizing a pre-certified Bluetooth module
I've designed a product that utilizes a Raytac MDBT50Q-P1MV2 'pre-certified' MCU+Bluetooth module (based on Nordic nRF52840) and am now considering what it would take for me to legally sell such a ...
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What is the power consumption of 200ms of Bluetooth Beacon advertising/broadcasting
I'm running an ESP32 on 3 AA batteries.
It wakes up up to 1000 times a day, then sends a Beacon advertisting for 200 milliseconds, and then goes to deep sleep, until ...
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Esp32 BLE repeater
I am using ESP32-S3 custom development board for my project.
I want to implement BLE repeater behavior in my project.
The idea is I have three ESP32-S3 boards.One as a server other as a receiver if ...
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How to build a BLE mesh node using HM-10?
I'm new to BLE and have been reading on BLE mesh and it seems perfect for my application.
I have multiple HM-10 modules and I'm able to send/receive data using a simple Arduino connection and a BLE ...
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Bluetooth IC performance improves after resoldering/heating
This is a very general question and I'm trying to brainstorm and get some insight into potential issues, things to watch out for etc. Unfortunately, I can't share the schematic or the datasheet.
My ...
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Adding a Bluetooth Peripheral to an STM32
I'm making a device that is powered by an STM32F072C8Tx.
I want to add a bluetooth peripheral to this that can connect to the computer as a HID and transmit keypresses.
I've considered swapping the ...
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Bluetooth module GPIO control
Note: This is my first real electronics project I've worked on by myself so I might just be asking a dumb question or this might be in the wrong forum. I am trying to figure out the hardware side of a ...
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Using SWRA117D 2.4 GHz antenna on a large board
I've added the board image. There is one ESP32-C3 on a 2 layer FR-4 board. My question is, how much I'm compromising with the efficiency of the antenna by placing it on a ~52X85mm board considering ...
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Reverse trilateration / multi-lateration using BLE Beacons
I'm currently working on a proof-of-concept to work out the estimated locations (longitude and latitude) of outdoor beacons with unknown locations to begin with.
The solution will use a mobile ...
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ESP32 - NimBLE increase throughput
I'm doing a OTA DFU with two ESP32 to upgrade a STM32 uC. This works out reliable so far, but the transmission speed over BLE between the two STM32 is really slow and so the DFU takes up to 10min, ...
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Using a Bluetooth module without MCU
I am making an EEG using an ADS1299.
To read the data I want to use a Bluetooth module and send data to a PC (I think this one should be OK) and power both with 2 coin cell batteries.
Can I do this ...
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How to make ESP32 wake-up signal and standby signal using Android app via BLE
I want to make an ESP32 device stand by and wake up using an Android app.
I know the ESP32 can be woken up using an external source but there is nothing much regarding using an app.
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UART and BLE Simultaneously
I'm using the nRF52832 Blue Feather module. This project has an endnode (Master) and many clients (Slaves). So the endnodis e connected to an online server to collect data and send the data to ...
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Multiple simultaneous ESP32 BLE connections to one mobile device
I'm trying to find out if it's possible for at least two ESP32's to maintain active BLE connections with one Android mobile device at the same time.
What I'm basically trying to do is to send analog ...
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How to improve RSSI on ESP32 BLE device [closed]
I'm testing an ESP Wroom 32 as BLE device (BLE server) using Arduino IDE and this setup:
...
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Is it possible to make a BLE HID without a microcontroller like an Arduino?
I am in a vocational highschool. I have a project where I have to make a HID like a keyboard or a mouse (wired) into Bluetooth wireless.
I've read many articles before like using an Arduino Pro Mini 3....
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Why is ESP32 BLE so power hungry?
The ESP32 consumes around 100-130mA when BLE is active and transmitting, while other BLE chips like nRF8001 only consume around 13mA when BLE is active and transmitting.
Am I missing something, or ...
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Using a CC2540 (BLE) in a PCB
I am currently trying to place an CC2540 on my circuit. I have a circuit using an AT-09 module that uses a CC2540 but I am trying to separate the CC2540 from the AT-09. I am using this diagram, https:/...
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How do I convert a AT-09/CC2540 BLE module onto my own PCB?
Do I need to take the entire AT-09 module or can I just solder on the CC2540 module? Also, what is the plastic cover on the AT-09 for (I'm guessing signal interference)? Is it necessary to have? I ...
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OTA via BLE on Cypress CYBLE-222014-01 Module
I have developed an application using the CYBLE-222014-01 module which acquires a set of data and transmits it over BLE. Now I would like to add OTA functionality to this project, however the ...
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Blocking BLE Chip Antenna from picking up signals in one direction
I am designing a BLE scanner/observer which uses a ceramic antenna.
I was wondering if there is any way to design the PCB such that the antenna chip only picks up signals from in front of it instead ...
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Extend range of BLE devices
I would like to extend the range of two BLE devices. The first one is a VR BLE controller with a monopole pcb antenna. The second one is an ESP32 Tinypico with a chip antenna.
I bought two pcb ...
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Arduino Mbed bootloader on nrf52840
I use a PCB that I designed on which is mounted the E73-2G4M08S1C from Ebyte (nrf52840). I flashed the Arduino Mbed bootloader with SWD and a J-Link (J-Flash) probe with no problem.
My computer then ...
