As soon as I am connecting 3.3 v from Arduino to ch_pd and vcc of esp8266, the port connected to Arduino becomes unavailable. Can you let me know how to proceed. I am using pin 2 of Arduino to tx of esp8266 and pin 3 to rx.
ESP8266 require much current. Maybe regulator of arduino is not capable of powering much current and thatswhy its output voltage drops when you connect ch_pd and vcc.
Try using another power source.
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I am trying to connect my ESP8266 to my computer to program it. However, I cannot even get passed the first step. Do not get the ready message to pop up.
Currently I have the 5v of the Arduino connected through a 1K ohm and then a 2k Ohm resistor to the VCC, the CH_PD and the reset pins on the ESP. The GPIO pin 0 is grounded and the ground is as well. The TX of the Arduino is connected to the RX of the ESP and the RX the Arduino is connected to the TX of the ESP through a 1K ohm and then a 2K ohm resistor.
I tried Arduino IDE, I've tried Putty, and even flashing it. Nothing works.
When running the Arduino IDE and you run the serial port, then type AT, nothing shows up in the box.
When using the method print to serial it prints AT but nothing is returned.
When using a flashing program it either says failed or cannot connect to device.
Right now there is a blue light and a red light on at all times.
You cannot power up es8266 using voltage divider, whenever you connect VCC to CH_PD, your VCC will pull down to very low voltage. You need to power your esp8266 using 3.3v, not 5V, nor voltage divider. You can connect 3.3V of your Arduino to esp8266.
I recently bought an ESP8266 (ESP-01, 1M) yet I have been unsuccessful in making it respond at all.
I have attempted to communicate with it using an Arduino Uno running the built-in BareMinimum script (and also the script described here) to work like an FTDI.
However, when any AT commands are sent to it via the Serial Monitor there is no response whatsoever using either approach.
The red power LED is on, yet the blue LED is always off.
My wiring:
GND - GND
RX - RX
TX - TX
VCC - 3v3
CH_PD - 3v3
I would love some clues as to how to solve this error,
Okay, seems like the same problem I spent hours.
Your Arduino TX has a high level of 5V. If you send a message to your ESP with this voltage you will (surely) destroy it. And I think thats happend to you.
So you have to buy a new ESP.
For the next try:
If you use a baudrate of 9600 you can just use two 10kOhm resistors to half your TX voltage. (I did this already and it worked without problems)
For sending a message to your Arduino 3.3V from your ESP are enought.
For higher baudrates you can use a logic level converter: https://learn.sparkfun.com/tutorials/using-the-logic-level-converter
I have an Arduino Uno Rev. 3 and have bought a GSM Shield
and an Ethernet Shield.
If I use the Arduino and GSM shield or the ethernet shield all works well. However, I want to use the Arduino with both the GSM shield and the ethernet shield.
I have searched the Internet and have read that I have a conflict on pin 4. The GSM shield uses pin 4 for the SD Card and the ethernet shield uses pin 4 for TX.
Can i fix this error? Is it possible to change this pin.
In a shield, hardware is managed in such a way that it will always connect to the particular pins. you can understood this in this way that if you place your Ethernet shield upon the Arduino then Ethernet's Tx pin will always connect to Arduino's pin 4.
So there is only one method to overcome this problem, don't place Ethernet shield directly to Ardunio. connect this with the jumpers externally and change Tx pin 4 to another pin in the programming which is free.
I don't know which pins are free in your code but lets assume Arduino's pin 6 is free so declare this as Ethernet TX pin (you will find out this in program) and connect this to Ethernet's pin 4.
You can use only one shield directly, now choose which one you want to use directly and change the pin configuration for the shield which is used externally.
I have an arduino mega ADK, with usb port, and an arduino uno.
- On the arduino uno, I put a xBee shield with the wifly module for connect to the internet.
- On the arduino mega ADK, I put the TinkerKit! shield.
I need to use both : xBee shield and TinkerKit!. and the single way i found, is to connect the arduino uno to the arduino mega ADK by USB wire (the wire is the one I use to connect an arduino to my computer).
Do you think it could work ? If yes, How can I get what is writting on the outpu of the arduino uno ? If no, is there an other way to do what I need ?
yes, it can be done, but is is way more easier to use directly the Hardware/Software Serial. Even if you get iw work, it will be a serial simulation over usb..
So using USB is just a layer of complexity that can break, and nothing more.
I am trying to connect an Arduino Mega2560 with the CAN bus shield from SparkFun and communicate. How do I go about it?
You connect the CAN device to your shield (connecting the CAN-Low and CAN-High signals correctly) and put at least one resistor of 120 ohm between the CAN low and CAN high signals (they are sometimes called terminating resistors, but they primarily act as pull-together resistors (similar to pull-up resistors for open-collector/open-drain)).