I need some guidance for making LED ON-OFF using Arduino Uno and GSM SIM900 with the help of internet data. Also how to setup free hosting server so that I can communicate my arduino with android app.
Step 1: set GPRS Commands(ie APN) of SIM900
Step 2: set tcp ip connection to your static server and port number(AT command is given in manual. static IP is must)
step 3: When TCP/IP connection gets ready, send command from server(use Hercules software) to your device to on/off led.
step 4: read server's command from your arduino and make led on/off.
I hope it help.
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I'm new to Arduino.
I have 4 Arduino boards separated by long distance. I wanted to make connections between all of them so, for example if one sensor connected to Arduino board number 1 (for example) was triggered it will send to all other 3 boards some kind of notification to do action on other boards. I intended to use Ethernet shield but wondered what is the best mode to use when configuring Ethernet Shields with Arduino and how to configure them to do so . I hope you understand. Thank you in advance.
On Arduino with a networking shield you can start an EthernetServer or WiFiServer. See ChatServer example of the Ethernet library.
On other Arduino with a networking shield you create an EthernetClient (or WiFiClient) and connect it to IP address of the server. Then everything you print to client's Client will be send to server's Client returned by server.available().
You can test the server with a Telnet client.
I am trying to connect a WiFi module (ESP8266) to a "funduino" development board (Arduino Nano) but I have no success. Since I tried so much schematics I've found on the internet about the connection between them two, I kindly ask here if is anyone who succeed in "pairing" this two devices.
I am asking for the schematic and a functional source code.
Regards
The ESP-01 by default comes with nonOS SDK bootloader that communicated via AT commands, you can find the complete command set from Expressif here. This is designed for an MCU (like Arduino Nano) to use it purely as an WiFi module rather than using it as a stand-alone MCU (for which it will require NodeMCU SDK).
If you ever upload an Arduino sketch up to the ESP-01, it will erase the AT Command firmware.
Assuming your ESP-01 is still having the AT Command firmware. What #Ben provided is a sketch that allows you to type AT commands via the Serial Monitor to internact with the ESP-01, it is manual, and good for testing if ESP-01 is working (you type AT and press return on Serial Monitor, the ESP-01 will ack with Ok) but not practical as a real application. The minimum commands required to established an WiFi connection with ESP-01 is listed below.
AT+CIPMUX=1 - Enable single (0) or multiple connection (1) to the web server.
Multiple connection is a good option if you are repeatedly sending
out or reading data from the Internet.
AT+CWMODE=3 - Set WiFi mode: 1 is station mode (ESP8266 is client), 2 is AP mode
(ESP8266 acts like a WiFi router where your phone or PC can connect),
3 is AP+station mode (make the ESP8266 do both)
AT+CWJAP=“<your-ssid>”,”<your-pw>” - Connect to your WiFi. Provide your SSID name
and password inside the double qoutes.
AT+CIFSR - This returns the IP address of the module, indicating that it has
successfully connected to your WiFi router.
Once the WiFi connection is established, you can further communicate with the ESP-01 via the connection, like accessing a website for example:
AT+CIPSTART=0,"TCP", "www.example.com","80” - Start TCP or UDP connection. The
0 is the id of the connection.
AT+CIPSEND=0,16 - Command to tell the module data is ready to be sent. 0 is the
connection id, and 16 is the length of the data to be sent.
After this command, the ESP8266 will reply with the “>”
character to tell us that it will be waiting for the data to be
sent. If successful, the module will reply with “SEND OK”
GET / HTTP/1.1 - Send the http header, and other data, etc...
You can write your own sketch to automate those AT commands for interacting with with ESP-01 once you understand the AT commands required for establish a WiFi connection.
Here are two resources that I personally found extremely useful for doing more than connecting to WiFi.
STM32-ESP-01 Web Server - although this is for interfacing with STM32, the main difference is the pin assignment, so you should be able to port to Arduino easily.
MQTT via ESP-01
As for hardware interface, please noted that what #Ben provided is correct in principle, but you need to be aware that the ESP-01(ESP8266 to be precise) is a 3V3 MCU, so the connection is depended on what kind of host board you are using. If you are using Arduino Uno/Nano, both are having a 5V MCU, you will need a voltage divider (two resistors to drop the voltage to 3v3 before connecting to ESP-01) or a level shifter chip at least for the ESP-01 Rx pin to avoid the potential damage to the ESP-01.
I've got my sim900 module working with arduino by using their software serial library, however, I want to eliminate arduino from the equation and have serial communication directly to sim900 module.
I'm using putty as my terminal emulator. It's serial is configured to COM1 19200 8 N 1 the same as device manager configuration for this port.
I connect straight from hardware serial on my PCs motherboard into serial-to-ttl interface board which connects to sim900 module. The board has 4 pins - VCC GND TX RX. They're all connected to my sim900 hardware serial as follows: VCC=5V GND=GND TX=TX RX=RX (Yes I know that it's always actually TX=RX and RX=TX, but when I connect it that way my interface board doesn't blink any led to indicate a transfer whereas it does when I connect TX=TX and RX=RX). The switch on the module is set to hardware serial pins as well.
So the only thing that happens when I send AT commands such as AT or ATI and press enter is that puttys cursor comes back to the beginning of command that I typed. No response.
I'm thinking that I'm not doing something that the arduinos software serial port is doing when it sends commands to sim900.
Can anyone help please ? It's literally been days of trying different configurations with no results.
In that time besides getting sim900 working with arduino software serial I verified that the hardware serial port on my motherboard is working correctly and the interface board is working correctly as well.
I've been trying to test a FT201XQ USB-I2C breakout board: UMFT201XB-01, so I can connect it to a master device such as an Arduino and sniff what that device is sending through I2C.
To see the output of the slave device I have successfully configured a Virtual COM PORT by installing the D2XX drivers provided by ftdchip.com. I can open the serial port through puTTY and everything seems fine in that regard.
Then, i've loaded the "master_writer" example on my Arduino, which sends 1 byte at a time to an address (0x22 is specified in the UM201XB-01 datasheet as the default address).
Nothing seems to happen in the COM port that i've earlier opened. Do I need to configure/program the FTDI device in some way? In that case, how can I do it, in a general way?
UMFT201XB-01 board http://www.ftdichip.com/Support/Documents/DataSheets/Modules/DS_UMFT201_220_230XB.pdf
Thank you in advance, and sorry if this is a "noob" question : P
I am attempting to send some data from Processing to my Arduino over the serial connection so that the Arduino can control an LED strip. Could I view the serial monitor while this transfer was taking place?
It is irking me that I cannot use any Serial.println statements (for debugging) while Processing is communicating with the Arduino. Everytime I try I get
Serial port 'COM3' already in use. Try quitting any programs that may be using it.
Is there a way for this serial communication to take place while I view the serial monitor at the same time?
The fact that the error message mentions COM3 suggests you are running on Windows. Unfortunately Windows doesn't allow multiple processes to simultaneously connect to the same serial port. This is different from Unix-based systems which do allow simultaneous serial port connections.
Using a Linux host, I have used a Python script send commands whilst monitoring results on the serial monitor. I seem to recall I had to open the serial monitor first and then run the other program.
Unfortunately, I can't help you with how to achieve that in Processing.
There is an application called Portmon that will allow you to monitor the serial communications on your PC.
Try 2 Serial communication,
Imagine you have already given USB as COM3 have a bluetooth device connected to your arduino Tx & Rx port, Let that be COM8. Now view COM3 in Arduino and COM8 in Processing.I could do this.