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  • Getting Started With the ESP8266 ESP-01

    What exactly do you mean by "On Top of a Arduino"? The ESP8266 can be programmed to fully function on it's own, with no Arduino connected.....or it can be connected so that communications are handled by the Arduino and passed through to the ESP8266.First and most importantly.....If you uploaded ANY sketches from Arduino to the ESP8266, (often you do this by setting the board in the Arduino interface to ESP8266 and then upload a sketch that goes into the ESP8266. Another way is to "flash" the ESP8266. If you did either, you likely overwrote the firmware that handles AT commands and you will ned to re-flash your ESP8266 with firmware usually from Expressif to regain the ability to use AT commands on the ESP8266.If you are certain you did neither and the ESP8266 is ...

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    What exactly do you mean by "On Top of a Arduino"? The ESP8266 can be programmed to fully function on it's own, with no Arduino connected.....or it can be connected so that communications are handled by the Arduino and passed through to the ESP8266.First and most importantly.....If you uploaded ANY sketches from Arduino to the ESP8266, (often you do this by setting the board in the Arduino interface to ESP8266 and then upload a sketch that goes into the ESP8266. Another way is to "flash" the ESP8266. If you did either, you likely overwrote the firmware that handles AT commands and you will ned to re-flash your ESP8266 with firmware usually from Expressif to regain the ability to use AT commands on the ESP8266.If you are certain you did neither and the ESP8266 is still in factory condition, you should be able to perform a simple test using the Arduino. Simply connect as follows....ESP8266------------------------------ArduinoVCC------------------------------------- 3.3vTX----------------------------------------RXRX----------------------------------------TX (try switching these is no response)GND--------------------------------------GNDThat's all you need to connect. Just be sure to upload a blank sketch into the Arduino before you begin. Next, (assuming Windows), using the Control Panel on your computer, go into the device manager and make sure the port for the Arduino shows up when you power the Arduino from the USB port.A new entry should pop up after a few seconds. That is the port number for your Arduino. Go into the Properties and make sure it is set to 115200 baud.Now in the Arduino Interface, make sure the Baud rate and ports match what you saw in the Device Manager in Windows. If they do, open the Serial Monitor and make sure at the bottom you have it set to 115200 baud and that Both NL and CR is selected in the first drop down box.Now at the top in the input box, enter capital AT and click send. If you do not receive OK you either accidentally flashed your ESP8266 and over wrote the factory firmware, your serial connection is bad (change USB cables and try again), or you received an ESP8266 that did not come with the AT firmware or is defective. In which case you should try a different one.

    PS...you can also try 9600 baud but as far as I know, ALL ESP8266's can operate at speeds between 300 baud and 115200 baud now. They usually come programmed to operate at 115200. 9600 was was when they first came out. Another "potential" problem is that the ESP8266 may not be getting enough power depending on your particular Arduino. If you're like me and have a drawer full of Arduinos, try another. You really should have no trouble powering just the ESP8266 from the Arduino for this simple test.

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  • Get Started With ESP8266 Using "AT Commands" Via Arduino

    The lack of a graphic connection diagram for this project was a major ommission

    I would recommend a 150 ohm resistor instead of 180 ohms because the ESP8266 is ok up to 3.6v and your 180ohm resistor drops the voltage to 3.245v which could result in the ESP8266 being under powered and thus not responding properly. Even with a 10% margin of resistor error you're still well within tolerances

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  • Wireless Temperature and Humidity Monitor With ESP8266

    Man! I just typed a lengthy explanation as to why many may not get past the AT command and my stupid mouse clicked it into oblivion. Sry :-(

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