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Questions tagged [hc-05]

HC‐05 module is Bluetooth SPP (Serial Port Protocol) module. Use HC-05 to communicate with any device with Bluetooth functionality like a Phone, PC or Tablet.

HC‐05 module is Bluetooth SPP (Serial Port Protocol) module. Use HC-05 to communicate with any device with Bluetooth functionality like a Phone, PC or Tablet.

114 questions
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Kotlin: Pass Bluetooth data to another Activity

I am making an android app that monitors sensors from my Arduino Mega 2560 and using Bluetooth HC-05 Module to connect the app and the Arduino. Right now I have the bluetooth connection and write done but I am stuck on read, I tried calling…
Xenon
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1 answer

Android BLE and HC-05 (with C code) data send and received?

In my project i use an Android and an HC-05 Bluetooth. I need to send a message to the HC-05 module and then I send me back some data. So I create a project like this : public class MainActivity extends AppCompatActivity{ @Override protected void…
Wolf
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1 answer

Arduino String Comparison

I have some data coming in through bluetooth serial and I have a very simple if statement to decide what to do next, however it is not firing as expected. I am total Arduino newb, does anyone know why this is happening? Here is the log output as…
nick_v1
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1 answer

Can't connect to to hc-08 bluetooth module with android

I tried to connect to the HC-08 Bluetooth module many times but at first, I can't pair module to android and I connect the module to android with Bluetooth Electronics but after the module, I paired I have another issue. I got the below error when…
Alirezaarabi
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1 answer

HC-05 Module AT command mode won't respond

I've been trying to connect two HC-05 bluetooth modules together as master and slave devices. I know that to do this i need to establish one as a slave device and one as a master using the AT command mode. I am using an arduino nano with each of the…
Shawn Poile
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1 answer

I'm missing "stuff" in my code and I don't get it

I'm newbie to coding and for the last few days, I've been trying to make a servo rotate 180 degrees by typing 1 on an app on my phone connected to an HC 05 Bluetooth module. When I type one the servo rotates 180 degrees when I type 0 the servo…
Tim Penglis
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1 answer

Transmit/Receive data Nodemcu(V3) + Bluetooth Module HC-05

I am trying to communicate with the HC-05 Bluetooth module for quite long time now, but with no success. I am using the Nodemcu(V3) ESP8266 module. I connect the HC-05 to Nodemcu in following sequence: HC-05 Nodemcu ----- …
Sandrocottus
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1 answer

Arduino serial monitor does not show anything for AT command

I am a beginner to arduino and trying to follow one of the videos from youtube to make a project- Master And Slave using HC-05 modules. I followed every step from that video carefully. Here's the link to the video ->…
EMAN SEID
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1 answer

Pass from HC-05 Data Mode to HC-05 AT Command mode by writing some bunch of code

My main problem is to reduce the power consumption of the HC-05 Bluetooth module. As it may be known, such a module consumes lower and lower energy when it is in the AT Command Mode (between 1.5 and 3 mA current). Since my project requires sending…
falcon_977
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