initial commit

This commit is contained in:
Lomanic 2020-01-12 23:46:53 +01:00
commit 1af9cf18d9
2 changed files with 161 additions and 0 deletions

12
README.md Normal file
View File

@ -0,0 +1,12 @@
# Nodemcu NTP clock with Max7219 LED matrix
## Hardware parts
* [Nodemcu v3 board](https://www.aliexpress.com/item/32565317233.html)
* [MAX7219 Dot Matrix Module For Microcontroller 4 In One Display with 5P Line](https://www.aliexpress.com/item/32616345083.html)
## Software dependencies
This uses the Arduino IDE with the [esp8266 core](https://arduino-esp8266.readthedocs.io/en/2.6.3/installing.html#boards-manager) and the following libraries, installed using the Libraries manager:
* [ezTime](https://github.com/ropg/ezTime) 0.8.3, to get time from NTP pool, properly format it and take in account timezones
* [MajicDesigns's MD_MAX72XX](https://github.com/MajicDesigns/MD_MAX72XX) library 3.2.1, to write hours on the Max7219 LED matrix (this builds mostly upon [the MD_MAX72xx_PrintText](https://github.com/MajicDesigns/MD_MAX72XX/blob/25da52707cd3bbcc2406b9984d694afabecf6002/examples/MD_MAX72xx_PrintText/MD_MAX72xx_PrintText.ino) sample)

149
nodemcu-max7219-clock.ino Normal file
View File

@ -0,0 +1,149 @@
#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>
#include <ezTime.h>
ESP8266WiFiMulti wifiMulti;
#include <MD_MAX72xx.h>
#include <SPI.h>
// Define the number of devices we have in the chain and the hardware interface
// NOTE: These pin numbers will probably not work with your hardware and may
// need to be adapted
#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
#define MAX_DEVICES 4
#define DATA_PIN 14 // or MOSI (D5 on NodeMCU)
#define CS_PIN 12 // or SS (D6 on NodeMCU)
#define CLK_PIN 13 // or SCK (D7 on NodeMCU)
// SPI hardware interface
//MD_MAX72XX mx = MD_MAX72XX(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);
// Arbitrary pins
MD_MAX72XX mx = MD_MAX72XX(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);
// Text parameters
#define CHAR_SPACING 1 // pixels between characters
// Global message buffers shared by Serial and Scrolling functions
#define BUF_SIZE 6
char message[BUF_SIZE] = "00:00";
void printText(uint8_t modStart, uint8_t modEnd, const char *pMsg)
// Print the text string to the LED matrix modules specified.
// Message area is padded with blank columns after printing.
{
uint8_t state = 0;
uint8_t curLen;
uint16_t showLen;
uint8_t cBuf[8];
int16_t col = ((modEnd + 1) * COL_SIZE) - 1;
mx.control(modStart, modEnd, MD_MAX72XX::UPDATE, MD_MAX72XX::OFF);
do // finite state machine to print the characters in the space available
{
switch (state)
{
case 0: // Load the next character from the font table
// if we reached end of message, reset the message pointer
if (*pMsg == '\0')
{
showLen = col - (modEnd * COL_SIZE); // padding characters
state = 2;
break;
}
// retrieve the next character form the font file
showLen = mx.getChar(*pMsg++, sizeof(cBuf) / sizeof(cBuf[0]), cBuf);
curLen = 0;
state++;
// !! deliberately fall through to next state to start displaying
case 1: // display the next part of the character
mx.setColumn(col--, cBuf[curLen++]);
// done with font character, now display the space between chars
if (curLen == showLen)
{
showLen = CHAR_SPACING;
state = 2;
}
break;
case 2: // initialize state for displaying empty columns
curLen = 0;
state++;
// fall through
case 3: // display inter-character spacing or end of message padding (blank columns)
mx.setColumn(col--, 0);
curLen++;
if (curLen == showLen)
state = 0;
break;
default:
col = -1; // this definitely ends the do loop
}
} while (col >= (modStart * COL_SIZE));
mx.control(modStart, modEnd, MD_MAX72XX::UPDATE, MD_MAX72XX::ON);
}
void setWifi() {
Serial.print("Connecting to wifi: ");
printText(0, MAX_DEVICES - 1, "WiFi");
WiFi.mode(WIFI_STA);
wifiMulti.addAP("XXX", "XXX");
wifiMulti.addAP("XXX", "XXX");
wifiMulti.addAP("XXX ", "XXX");
while (wifiMulti.run() != WL_CONNECTED) { // Wait for the Wi-Fi to connect: scan for Wi-Fi networks, and connect to the strongest of the networks above
delay(1000);
Serial.print('.');
}
Serial.println();
}
Timezone myTZ;
void setClock() {
printText(0, MAX_DEVICES - 1, "NTP");
// Make ezTime show us what it is doing
setDebug(INFO);
// Wait for ezTime to get its time synchronized
waitForSync();
// See if local time can be obtained (does not work in countries that span multiple timezones)
if (myTZ.setLocation()) {
Serial.println(myTZ.dateTime());
} else {
Serial.println(errorString());
myTZ.setPosix(F("CET-1CEST,M3.5.0,M10.5.0/3")); // Europe/Paris
}
myTZ.setDefault();
Serial.println(myTZ.dateTime());
// Set NTP polling interval to 1 hour.
setInterval(60 * 60);
}
void setup() {
mx.begin();
Serial.begin(115200);
Serial.println();
setWifi();
setClock();
}
bool showColon = true;
void loop() {
// Register ezTime events
events();
if (secondChanged()) {
showColon = !showColon;
char dateFormat[BUF_SIZE] = "H:i";
if (!showColon) {
strcpy(dateFormat, "H i");
}
printText(0, MAX_DEVICES - 1, dateTime(dateFormat).c_str());
}
}