Lua Code
print(adc.read(0))
NodeMCU Flasher
esptool.py –port COMx
Resources
Documentation
https://nodemcu.readthedocs.io/en/release/
Download site
http://luabinaries.sourceforge.net/download.html
Extract (unzip) the lua-5.x._win64_bin.zip
Unzip (files)
Create a new folder
D:\Program Files\LUA
Copy all the unzip files into this folder
Rename the lua54.exe to lua.exe
Append a new path for lua.exe to the Windows 10 System environment variable path
Launch the Lua 5.x interpreter from command prompt (terminal)
If everything has been done correctly then you see the Lua 5.x.x Copyright (C) otherwise check the system variable environment path again. Note the semcolon ( ; ) entries before and after the path value.
Requirements
ESP8266 ESP-01/ESP-01S
Arduino Sketch / Code
#include <ESP8266WiFi.h>
void setup()
{
Serial.begin(115200);
Serial.println();
Serial.print("Setting soft-AP ... ");
boolean result = WiFi.softAP("ESPsoftAP_01", "pass-to-soft-AP");
if(result == true)
{
Serial.println("Ready");
}
else
{
Serial.println("Failed!");
}
}
void loop()
{
Serial.printf("Stations connected = %d\n", WiFi.softAPgetStationNum());
delay(3000);
}Access Point SSID name and password
boolean result = WiFi.softAP("ESPsoftAP_01", "pass-to-soft-AP");
edit the above bold word with your own SSID name and password. Save and recompile your code again.
Requirements
- DHT11 Temperature and Humidity
- USB to UART ESP01 Programmer
- ESP8266 ESP01/01s (512KB / 1 Mbyte)
- File System Uploader plug-in installed
Circuity
Code
#include "FS.h"
#include "DHT.h"
#define DHTPIN 2 // the digital pin we are connected to
#define DHTTYPE DHT11 // define type of DHT sensor we are using
DHT dht(DHTPIN, DHTTYPE); // create DHT object
void setup() {
Serial.begin(115200);
dht.begin(); // intialize DHT object
// always use this to "mount" the filesystem
bool ok = SPIFFS.begin();
if (ok) {
Serial.println("SPIFFS initialized successfully");
}
else{
Serial.println("SPIFFS intialization error");
}
}
void loop() {
// Wait a few seconds between measurements.
delay(2000);
//read temperature as Celcius
float t = dht.readTemperature();
// Check if any reads failed and exit early (to try again).
if (isnan(t)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
//open log.txt file
File f = SPIFFS.open("/log.txt", "a");
if (!f) {
Serial.println("file open failed");
}
// save temperature reading
f.print(t);
f.println("deg C");
//close file
f.close();
delay(8000);
}Resources
https://arduino-esp8266.readthedocs.io/en/latest/filesystem.html
https://thebigpotatoe.github.io/Effortless-SPIFFS/
https://www.arduino.cc/reference/en/libraries/effortless-spiffs/