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MicroPython ESP8266 Nokia 5110 Quad 7-segment
A MicroPython library for emulating a quad 7-segment LED display modules using a Nokia 5110 display with PCD8544 driver.
The 84x48 PCD8544 buffer:
They are called 7-segment displays as there are 7 LEDs for each digit (segment). One byte (7 lower bits) for each segment. The 8th bit (MSB) is for the decimal point.
A
---
F | | B
-G-
E | | C
--- * H
D
HGFEDCBA
0b01101101 = 0x6D = 109 = show "5"
| Display | Bin | Hex | Dec |
|---|---|---|---|
| 0 | 0b00111111 | 0x3F | 63 |
| 1 | 0b00000110 | 0x06 | 6 |
| 2 | 0b01011011 | 0x5B | 91 |
| 3 | 0b01001111 | 0x4F | 79 |
| 4 | 0b01100110 | 0x66 | 102 |
| 5 | 0b01101101 | 0x6D | 109 |
| 6 | 0b01111101 | 0x7D | 125 |
| 7 | 0b00000111 | 0x07 | 7 |
| 8 | 0b01111111 | 0x7F | 127 |
| 9 | 0b01101111 | 0x6F | 111 |
| A | 0b01110111 | 0x77 | 119 |
| b | 0b01111100 | 0x7C | 124 |
| C | 0b00111001 | 0x39 | 57 |
| d | 0b01011110 | 0x5E | 94 |
| E | 0b01111001 | 0x79 | 121 |
| F | 0b01110001 | 0x71 | 113 |
| G | 0b00111101 | 0x3D | 61 |
| H | 0b01110110 | 0x76 | 118 |
| I | 0b00000110 | 0x06 | 6 |
| J | 0b00011110 | 0x1E | 30 |
| K | 0b01110110 | 0x76 | 118 |
| L | 0b00111000 | 0x38 | 56 |
| M | 0b01010101 | 0x55 | 85 |
| n | 0b01010100 | 0x54 | 84 |
| O | 0b00111111 | 0x3F | 63 |
| P | 0b01110011 | 0x73 | 115 |
| q | 0b01100111 | 0x67 | 103 |
| r | 0b01010000 | 0x50 | 80 |
| S | 0b01101101 | 0x6D | 109 |
| t | 0b01111000 | 0x78 | 120 |
| U | 0b00111110 | 0x3E | 62 |
| v | 0b00011100 | 0x1C | 28 |
| W | 0b00101010 | 0x2A | 42 |
| X | 0b01110110 | 0x76 | 118 |
| y | 0b01101110 | 0x6E | 110 |
| Z | 0b01011011 | 0x5B | 91 |
| blank | 0b00000000 | 0x00 | 0 |
| - | 0b01000000 | 0x40 | 64 |
| * | 0b01100011 | 0x63 | 99 |
Parts
- WeMos D1 Mini $4.00 USD
- Nokia 5110 module $2.10 USD
- Breadboard 400 point $1.02 USD
- Jumper wire $1.72 USD
Connections
| WeMos D1 Mini | Nokia 5110 PCD8544 LCD |
|---|---|
| D3 (GPIO0) | 0 RST |
| D4 (GPIO2) | 1 CE |
| D8 (GPIO15) | 2 DC |
| D7 (GPIO13) | 3 Din |
| D5 (GPIO14) | 4 Clk |
| 3V3 | 5 Vcc |
| D6 (GPIO12) | 6 BL |
| G | 7 Gnd |
Links
License
Licensed under the MIT License.