Is it possible for an Arduino Uno subscribe/connect to MQTT Broker (Mosquitto) without using Ethernet Shield or Wifi Shield?
Actually I have a Wifi module (ESP8266) with me, unfortunately it won't allow me to upload sketch and I keep getting error error: espcomm_upload_mem failed
When I interface Arduino Uno with ESP8266 Wifi Module, I construct like this:
And I have included Generic ESP8266 Module in board manager.
Is it possible for an Arduino Uno subscribe/connect to MQTT Broker (Mosquitto) without using Ethernet Shield or Wifi Shield?
Of course you need a network to handled a PubSubClient.h library for your MQTT Broker.
I keep getting error error: espcomm_upload_mem failed
I think you have something wrong about the wired or the code, can you post your schematic and your code into your question? so that i get why have this errors.
see this library.
Related
I want to connect my arduino nano with my ESP-32 (in order to use it for wireless communications).
I got this ESP board (see pic).
Any idea how I can connect it? I can't find any documentation for the pin on this board.
Check this,
https://www.espressif.com/en/products/hardware/esp32/resources
You can directly use ESP32 to perform the same functions of arduino.
I am using ESP8266-01 with Arduino Uno... I am able to compile example code of ESP8266 with Generic ESP8266 module board with arduino ide but unable to upload it to Uno...., it is giving an error: espcomm_upload_mem failed while uploading the code to Uno
How the code is compiled is based on the board you have set in the Arduino IDE.
Before you compile and upload, have you switched the IDE to use an Uno board?
In the Arduino IDE try:
Tools | Board | Arduino Uno
Esp8266 generic example will not run on Arduino Uno. Possibly your device is selected as Esp8266 from Device Manager as gurus said. What you need to run Uno with Esp is writing Esp8266 serial controller to Uno. Here is the sample. Good luck.
I am trying to use the sparkfun CAN Bus shield https://www.sparkfun.com/products/10039
I can send data using this library
https://github.com/Seeed-Studio/CAN_BUS_Shield
but I can not read data, has anyone had the same problem and solved it?
Can anyone tell me how I can send the following arduino code, in a single SMS message via GSM network
Serial.print("http://maps.google.com/?q=");
latitude();
Serial.print(',');
longitude();
I'm currently using the Arduino Wifi Shield. It works fine with the Arduino Library, but I have a project in which I need to get rid of all the Arduino library, and use only the AVR-libc.
Therefore, in order to use the Wifi shield, I would like to know where there is a documentation about the protocol used on the SPI bus between the arduino and the shield, so that I do not need to use the Wifi Library.
Am I forced to look at the source code, or does any document exist?
Thanks.
The documentation for SPI will be contained in the datasheet for the MCU used in the Arduino. For AVR-based Arduinos, look in the section titled "SPI – Serial Peripheral Interface". For the Arduino Due, see the "Serial Peripheral Interface (SPI) Programmer Datasheet" section.