Questions tagged [bluetooth]
A low bandwidth, low-power short-range wireless protocol typically used for personal area networks that operates on 2.4GHZ-2.485GHZ.
926 questions
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Hardwire an Bluetooth Tracker tag [closed]
I am trying to find out what would take to harwire a "consumer" Bluetooth tracking tag, like Apple AirTag, Tile, iTagPro,or equivalent. The intent is to use it on a motorcycle that will be ...
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UART on custom STM32 Microcontroller board outputs garbage data
Recently, got a custom STM32F103CBT6 microcontroller board manufactured and got a basic GPIO pin to blink an LED. However, once I started trying to output simple messages via a UART port, using a HC-...
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Bluetooth speaker to wired: Easy way to bypass BT to link AUX directly to amplifier
Trying to turn a Bluetooth speaker unit into a wired one. Need help in knowing what needs to be done to make the speaker take AUX line-in audio to output it without any BT interface in between. It is ...
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Use of Inductor on Oscillator line
I am working with the WIFI module AP6256 and found this as a reference schematic. I am unsure what L5 and L9 inductors are used for. Can I ignore them?
Link to Datasheet: https://lcsc.com/datasheet/...
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Kaga Fei ES2832 EVK-v1 help? (Or similar Taiyo Yuden) - nRF52832
I am looking for someone who knows how to get a "hello world" running on this EVK from Kaga Fei (formerly a Taiyo Yuden product)... I want to use it for some wearable bluetooth applications. ...
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HC-05 Bluetooth Module Connects but Doesn’t Work After AT Command Change
I successfully entered AT mode on my HC-05 Bluetooth module (version: hc05V2.3_le) using an Arduino Uno and changed the module name using AT+NAME. However, after that:
The module appears in the phone'...
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Identifying ETKB14C9A (A3 Logo) Chip Used in USB Audio Modules
I have come across an IC labeled "ETKB14C9A" with an "A3" logo on a PCB used in low-cost Chinese USB audio modules. Despite extensive searches, I couldn't find any datasheet or ...
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HSP Profile on CC256xB with STM32F4Discovery without ST-ADAPT
I am trying to run the HSP profile on a Texas Instruments CC256xB to connect it to Bluetooth headphones, using an STM32F4Discovery and the CC256x STM32 Bluetopia SDK v5.1.1.1. I am developing in IAR ...
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Programming Qcc3008 bt chip as a transmitter [closed]
I have a Qualcomm QCC3008 bt module, and I want to program it as a transmitter only. I can't find in ADK configuration tool the option to set it to transmitting mode... Any help?
https://a.aliexpress....
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How can I disable the capacitive touch sensor on an old Bluetooth earbud for a PAM8403 wireless speaker project?
I'm working on a project to convert an old Bluetooth earbud into a wireless speaker by connecting it to a PAM8403 Class‑D amplifier. The earbud’s capacitive touch sensor (a metal pad which normally ...
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PCM1754 with ESP32 WROOM 32E
In this circuit there is no audio coming out from pins 7 and 8 of the PCM 1754 IC.
I have double checked all connections, voltages and added a RC filter right after C9 and C10.
The ESP32 receives ...
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Is there a bluetooth-serial module that can change baudrate mid-transmission? [closed]
I have a device which uses a proprietary cable with an embedded USB-UART chip inside.
This cable is somewhat expensive, so I decided to try and modwire a Bluetooth-serial module inside the device.
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Bluetooth+MicroSD on ESP32 i2S
for my project, I need to use both the Bluetooth of the ESP32 and use audio from my micro SD to play them.
I use a MAX98357A, a mini SD module (3.3V - CS - MOSI -CLK - MISO -GND)
I don't need it to ...
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Minimum distance required between two ESP32 dev boards
I am making a design that uses two ESP32 dev boards. One dev board is used for ESP-NOW while the other connects to my Wifi for the ESP Rainmaker.
I am using Veroboard. My question is, what should the ...
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Why MH-M38 module haven't ground loop noise?
As you know, when we connect a Bluetooth module and a separate amplifier module to a common power supply, the sound output has a noise. If this is the case, then why is there no noise in MH-M38 module,...
