7 segment display

Introduction

The 7 segment plugin support two different chip types, the TM1637 (4 digits) and the MAX7219/21 (8 digits).

Hardware

    ESP            TM1637
    GPIO    <-->   CLK
    GPIO    <-->   DIO

    ESP            MAX7219
    GPIO    <-->   DIN
    GPIO    <-->   CLK
    GPIO    <-->   CS

    Power          chip
    3.3V*   <-->   VCC
    GND     <-->   GND
    
    *Many 7 segment displays state that they need 5V to operate but we have successfully powered them using 3.3V.

8 digit display

4 digit display

ESP Easy

Use the device tab on the ESP Easy web interface and create a new task by editing one of the available tasks. Select "Display - 7 segment". Available in testing at the moment. Settings are as follows.

TM1637

If you use the 4 digit chip (TM1637) you only need two gpios.

MAX7219

If you use the 8 digit chip (MAX7219) you need three gpios.

Commands

Setting	Information
Manual	Display is manually updated sending commands (see below)
Clock - Blink	Display is automatically updated with current time and blinking dot/lines
Clock - No Blink	Display is automatically updated with current time and steady dot/lines
Date	Display is automatically updated with current date

Commands

Command	Value	Extra information
7dn,<value>	-999...9999 -9999999...99999999	Display the number (positive or negative). If you use decimal point and the number is longer than the display allows it will be rounded. 7dn, n stands for "number". Only used if set to "manual"!
7dt,<value>	-99°...999° -999999°...9999999°	Display the temperature (positive or negative). If you use decimal point and the number is longer than the display allows it will be rounded. 7dt, t stands for "temperature".Only used if set to "manual"!
7don	-	Turn the display on.
7doff	-	Turn the display off.
7db,<value>	0...15	Change the brightness of the display. Possible to dim it further if you disconnect the VCC (power it over the GPIOs).