What I've learned about the very exciting $3 WiFi module.
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My Links:
Useful links:
GPIO Map Table (source: nodemcu api)
| IO index | ESP8266 pin | IO index | ESP8266 pin |
|---|---|---|---|
| 0 | GPIO12 | 8 | GPIO0 (low=upgrade firmware) |
| 1 | GPIO13 | 9 | GPIO2 (available) |
| 2 | GPIO14 | 10 | GPIO4 |
| 3 | GPIO15 | 11 | GPIO5 |
| 4 | GPIO3 | ||
| 5 | GPIO1 | ||
| 6 | GPIO9 | ||
| 7 | GPIO10 |
1. Wire up the ESP-01. To prepare it for firmware flashing, GPIO 00 should be connected to ground before you apply power to the ESP.
2. Visit www.nodemcu.com
4. You can download the actual firmware binaries in pre_built. However, it's even easier if you download the flasher itself because it has the firmware included in there! Get the 32bit or 64 bit version depending on your PC's OS.
6. It should find your FTDI port automatically. Click Flash button and wait till you get a checkmark at bottom left.
7. Quit the flasher app.
9. Use some sort of a terminal program to connect to the FTDI port. I'm biased towards LUA Uploader (I wrote it :-))
10. Write a hello world lua progam.
11. Have fun!
This is a placeholder for resources that I'm studying towards using MQTT with the ESP8266.
How many ESP-01s can we fit on one breadboard?
Actually, this is a demo of ESPs talking to each other. However, I do have quite a few ESPs on the breadboard.
I wanted to control A/C devices, but I didn't want to deal with high voltages. Then I remember X-10 home automation system which according to Wikipedia is 40 years old!? Probably not very practical, but it was fun!
Huge thanks to NodeMCU!
Code and Schematic coming soon...
Arduino Code
Source: ESP8266 documentation
AT // Returns OK
AT+RST // Returns OK
AT+CWMODE=1 // 1=Client, 2=Access Point, 3=Client & AP. Returns either "OK" or "no change"
AT+CIPMUX=0 // 0=Single Channel, 1=Multi Channel. Returns OK
AT+CIPMODE=0 // 0=Received data will be sent to serial port as +IPD,conn, len. 1=plain data stream. Returns OK
AT+CWJAP="WIFI_SSID","WIFI_PASSWORD" // Connect to WIFI_SSID. Returns OK
AT+CIFSR // Returns module's IP Address followed by OK
AT+CIPSTART="TCP","SERVER_IP",PORT_NUM // Connect to SERVER_IP to send data. Returns OK
AT+CIPSEND=LENGTH // Prepare to send string of LENGTH bytes. Returns ">"
Once ">" is received, send the actual data (must end with two sets of CR+LF (counted in LENGTH). Returns OK or ERROR.
AT+CIPCLOSE // Close the connection to SERVER_IP. Returns OK or ERROR
a Tutorial on CLOUD coding with NodeMCU
http://bbs.smartarduino.com/showthread.php?tid=3
Great to see another project of yours and quite a cool one too :) I had them for a while now but yesterday was the first time I played with them - sadly with no connection to the router but I could at least get a list of AP and communicate with the dongle. Great videos by the way, had to subscribe on youtube!
Hi Dave,
The ESP8266 is fun, but it also has been frustrating sometimes. Reliability is still not there but hopefully all that is firmware. Although I've only tried the original AT-commands and NodeMCU, there's also FreeRTOS and probably more. Thanks for subscribing on YouTube. I'm working on a RubeGoldberg ESP8266 project now. Got it mostly working.
Hari Wiguna
ESP8266 NodeMcu Dev: http://doit-nodemcu-dev.doit.am
ESP8266 NodeMcu Motor: http://doit-nodemcu-motor.doit.am
NodeMcu Wifi Car: http://doit-nodemcu-car.doit.am
WiFi Car Dev:http://doit-nodemcu.doit.am/index.html
NodeMcu+motor shield+wifi car
is on
http://goo.gl/jKNYgT