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3 votes

Arduino with HC-05 Bluetooth Module | No data will be transmitted

The TX signal coming from either the Arduino or HC-05 should be connected to the RX of the other as I understand it, because both are labeled from the perspective of their respective chips Like @...
Verilyzed's user avatar
3 votes
Accepted

Sharing serial Rx to read a push button on ESP8266-01

I have experimented with my NodeMCU (ESP8266-12F, but the core chip is the same ESP8266EX). First, the theory: UART is a asynchronous serial protocol. It has a configuration which consits of the ...
Maximilian Gerhardt's user avatar
3 votes
Accepted

ESP8266 + HC-05 on same arduino

You can (just about) use any combination of two of: Serial to PC, HC-05 ESP-03 You have, basically, a hardware UART (pins 0/1), and a software UART (any pins of your choice). Only the hardware UART ...
Majenko's user avatar
  • 105k
3 votes

Arduino Uno won't upload code and overheats

The fact that it doesn't blink the LED when plugged in or reset indicates that the bootloader of the main microcontroller no longer works. The fact that the computer no longer recognizes the board as ...
tttapa's user avatar
  • 1,320
2 votes

RX and TX pin in Arduino Uno

You can't magic more pins out of thin air. Yes you can! You can have as many output (and even input) pins as you want. I managed to build 8x8x8 LED cube using ATTiny13 with just 6 output pins (using ...
Filip Franik's user avatar
  • 1,292
2 votes

When I see the red RX LED flash I am wondering if it means there is an error?

The TX LED is there to show that some data or signal has been received on your Arduino. When you press the button on your circuit, it briefly sends a signal which then triggers the RX LED on your ...
Wisaacj's user avatar
  • 33
2 votes

Alternative Rx/Tx Pins for Arduino Uno and Pro Mini

Pins D0 and D1 are used for hardware serial, see Serial library reference. You can use any other pins for virtual Rx/Tx lines employing a software serial mode, for example by using the SoftwareSerial ...
Greenonline's user avatar
  • 3,032
1 vote

avrdude: stk500v2_ReceiveMessage(): timeout error for bluetooth arduino

The Bluetooth range is small so the robot can't be far from the computer for upload. To solve the reset for the Bluetooth you could add a reset button on the robot and use it while avrdude attempts ...
Juraj's user avatar
  • 18k
1 vote

Alternative Rx/Tx Pins for Arduino Uno and Pro Mini

The Arduino SoftwareSerial library can use any pair of pins. AltSoftSerial uses special pins. AltSoftSerial uses a 16 bit hardware timer to generate the transmit output and measure the receive input ...
Juraj's user avatar
  • 18k
1 vote
Accepted

Easy way to upload sketches using MIDI (without RX pin removed)

To allow the bootloader on the Arduino MCU to communicate with the USB chip, the TXD/RXD pins are connected: These connections have 1 kΩ resistors so that the signals of the USB chip do not interfere ...
CL.'s user avatar
  • 401

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