ES32A08
Board comes without esp32 (use wroom 32 devkit)
Description
This is a very capable little automation/relay/io board from
AliExpress
It runs on 12V or 24V depending on your configuration and is perfect for industrial and home automation
Exposes
- 8 Relay Outputs (Labeled O1-O8)
- 8 24V Inputs (Labeled I1-I8)
- 4 Analag inputs (0-20ma) (Labeled ADC1-ADC4)
- 2 Analog inputs (0-10V) (Labeled ADC5-ADC6) (ADC7-ADC8 are not usable when using WiFi)
- 4 Input buttons (Labeled KEY1-KEY4)
- 1 Status LED (Labeled "status LED")
- 1 4 Digit 7 Segment display (listens on configurable homeassistant text sensor) (still a little buggy)
Known limitations
- 4 Digit display has problems with trailing dots
- RS485 has a hardware bug and can't be used reliably, see https://github.com/makstech/esphome-es32a08-expansion-board-example/issues/2#issuecomment-3165396638
Example Configuration
esphome:
name: xxx
esp32:
board: esp32dev
framework:
type: arduino
# not compatible with esp idf as of now
#framework:
# type: esp-idf
# version: recommended
# Enable logging
logger:
# Enable Home Assistant API
api:
encryption:
key: "xxx"
ota:
- platform: esphome
password: "xxx"
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
# Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: "Es32A08-01 Fallback Hotspot"
password: "xxx"
text_sensor:
- platform: homeassistant
name: "Text from Home Assistant"
id: home_assistant_text
entity_id: input_text.test
script:
- id: display_text
then:
- lambda: |-
std::string text = id(home_assistant_text).state;
// Pad with spaces if the text is shorter than 4 characters
while (text.length() < 4) {
text = " " + text;
}
auto clear_display = [&]() {
id(G1).set_state(0);
id(G2).set_state(0);
id(G3).set_state(0);
id(G4).set_state(0);
id(DP).set_state(0);
id(A).set_state(0);
id(B).set_state(0);
id(C).set_state(0);
id(D).set_state(0);
id(E).set_state(0);
id(F).set_state(0);
id(G).set_state(0);
};
// Character to segment map
const uint8_t char_map[95] = {
0b00000000, // ' ', ord 0x20
0b10110000, // '!', ord 0x21
0b00100010, // '"', ord 0x22
0b00000000, // '#', ord 0x23
0b00000000, // '$', ord 0x24
0b01001001, // '%', ord 0x25
0b00000000, // '&', ord 0x26
0b00000010, // ''', ord 0x27
0b01001110, // '(', ord 0x28
0b01111000, // ')', ord 0x29
0b01000000, // '*', ord 0x2A
0b00000000, // '+', ord 0x2B
0b00010000, // ',', ord 0x2C
0b00000001, // '-', ord 0x2D
0b10000000, // '.', ord 0x2E
0b00000000, // '/', ord 0x2F
0b01111110, // '0', ord 0x30
0b00110000, // '1', ord 0x31
0b01101101, // '2', ord 0x32
0b01111001, // '3', ord 0x33
0b00110011, // '4', ord 0x34
0b01011011, // '5', ord 0x35
0b01011111, // '6', ord 0x36
0b01110000, // '7', ord 0x37
0b01111111, // '8', ord 0x38
0b01111011, // '9', ord 0x39
0b01001000, // ':', ord 0x3A
0b01011000, // ';', ord 0x3B
0b00000000, // '<', ord 0x3C
0b00001001, // '=', ord 0x3D
0b00000000, // '>', ord 0x3E
0b01100101, // '?', ord 0x3F
0b01101111, // '@', ord 0x40
0b01110111, // 'A', ord 0x41
0b00011111, // 'B', ord 0x42
0b01001110, // 'C', ord 0x43
0b00111101, // 'D', ord 0x44
0b01001111, // 'E', ord 0x45
0b01000111, // 'F', ord 0x46
0b01011110, // 'G', ord 0x47
0b00110111, // 'H', ord 0x48
0b00110000, // 'I', ord 0x49
0b00111100, // 'J', ord 0x4A
0b00000000, // 'K', ord 0x4B
0b00001110, // 'L', ord 0x4C
0b00000000, // 'M', ord 0x4D
0b00010101, // 'N', ord 0x4E
0b01111110, // 'O', ord 0x4F
0b01100111, // 'P', ord 0x50
0b11111110, // 'Q', ord 0x51
0b00000101, // 'R', ord 0x52
0b01011011, // 'S', ord 0x53
0b00000111, // 'T', ord 0x54
0b00111110, // 'U', ord 0x55
0b00111110, // 'V', ord 0x56
0b00111111, // 'W', ord 0x57
0b00000000, // 'X', ord 0x58
0b00100111, // 'Y', ord 0x59
0b01101101, // 'Z', ord 0x5A
0b01001110, // '[', ord 0x5B
0b00000000, // '\', ord 0x5C
0b01111000, // ']', ord 0x5D
0b00000000, // '^', ord 0x5E
0b00001000, // '_', ord 0x5F
0b00100000, // '`', ord 0x60
0b01110111, // 'a', ord 0x61
0b00011111, // 'b', ord 0x62
0b00001101, // 'c', ord 0x63
0b00111101, // 'd', ord 0x64
0b01001111, // 'e', ord 0x65
0b01000111, // 'f', ord 0x66
0b01011110, // 'g', ord 0x67
0b00010111, // 'h', ord 0x68
0b00010000, // 'i', ord 0x69
0b00111100, // 'j', ord 0x6A
0b00000000, // 'k', ord 0x6B
0b00001110, // 'l', ord 0x6C
0b00000000, // 'm', ord 0x6D
0b00010101, // 'n', ord 0x6E
0b00011101, // 'o', ord 0x6F
0b01100111, // 'p', ord 0x70
0b00000000, // 'q', ord 0x71
0b00000101, // 'r', ord 0x72
0b01011011, // 's', ord 0x73
0b00000111, // 't', ord 0x74
0b00011100, // 'u', ord 0x75
0b00011100, // 'v', ord 0x76
0b00000000, // 'w', ord 0x77
0b00000000, // 'x', ord 0x78
0b00100111, // 'y', ord 0x79
0b00000000, // 'z', ord 0x7A
0b00110001, // '{', ord 0x7B
0b00000110, // '|', ord 0x7C
0b00000111, // '}', ord 0x7D
0b01100011, // '~', ord 0x7E (degree symbol)
};
auto set_digit = [&](int digit, uint8_t ch, bool dot) {
clear_display();
id(G1).set_state(digit == 0);
id(G2).set_state(digit == 1);
id(G3).set_state(digit == 2);
id(G4).set_state(digit == 3);
uint8_t segments = char_map[ch];
id(DP).set_state((segments & 0b10000000) || dot);
id(A).set_state(segments & 0b01000000);
id(B).set_state(segments & 0b00100000);
id(C).set_state(segments & 0b00010000);
id(D).set_state(segments & 0b00001000);
id(E).set_state(segments & 0b00000100);
id(F).set_state(segments & 0b00000010);
id(G).set_state(segments & 0b00000001);
delay(5);
};
int l = text.length();
bool dot = false;
uint8_t tmp = 0;
// Iterate over each digit position (up to 4)
for (int i = 0; i < 4; ++i) {
// Check if the character is a dot
if (text[i] == '.') {
// Display the dot on its own
set_digit(i, 0, true);
} else {
// Character is not a dot, check if the next character is a dot
if ((i + 1 < l) && (text[i + 1] == '.')) {
// The next character is a dot
dot = true;
// Erase the dot, so it won't be processed again
text.erase(i + 1, 1);
// Update the length after erasure
l = text.length();
} else {
dot = false;
}
// Adjust the character to the segment map
if (text[i] < 32) {
tmp = 0;
} else {
tmp = text[i] - 32;
}
// Set the digit with or without the dot
set_digit(i, tmp, dot);
}
}
interval:
- interval: 25ms
then:
- script.execute: display_text
sn74hc595:
- id: 'sn74hc595_hub'
data_pin: GPIO13
clock_pin: GPIO27
latch_pin: GPIO14
oe_pin: GPIO4
sr_count: 3
switch:
- platform: gpio
name: "O1"
pin:
sn74hc595: sn74hc595_hub
number: 16
inverted: false
- platform: gpio
name: "O2"
pin:
sn74hc595: sn74hc595_hub
number: 17
inverted: false
- platform: gpio
name: "O3"
pin:
sn74hc595: sn74hc595_hub
number: 18
inverted: false
- platform: gpio
name: "O4"
pin:
sn74hc595: sn74hc595_hub
number: 19
inverted: false
- platform: gpio
name: "O5"
pin:
sn74hc595: sn74hc595_hub
number: 20
inverted: false
- platform: gpio
name: "O6"
pin:
sn74hc595: sn74hc595_hub
number: 21
inverted: false
- platform: gpio
name: "O7"
pin:
sn74hc595: sn74hc595_hub
number: 22
inverted: false
- platform: gpio
name: "O8"
pin:
sn74hc595: sn74hc595_hub
number: 23
inverted: false
- platform: gpio
name: "status LED"
pin: GPIO15
inverted: True
output:
- platform: gpio
id: "A"
pin:
sn74hc595: sn74hc595_hub
number: 0
inverted: false
- platform: gpio
id: "B"
pin:
sn74hc595: sn74hc595_hub
number: 1
inverted: false
- platform: gpio
id: "C"
pin:
sn74hc595: sn74hc595_hub
number: 2
inverted: false
- platform: gpio
id: "D"
pin:
sn74hc595: sn74hc595_hub
number: 3
inverted: false
- platform: gpio
id: "E"
pin:
sn74hc595: sn74hc595_hub
number: 4
inverted: false
- platform: gpio
id: "F"
pin:
sn74hc595: sn74hc595_hub
number: 5
inverted: false
- platform: gpio
id: "G"
pin:
sn74hc595: sn74hc595_hub
number: 6
inverted: false
- platform: gpio
id: "DP"
pin:
sn74hc595: sn74hc595_hub
number: 7
inverted: false
- platform: gpio
id: "G1"
pin:
sn74hc595: sn74hc595_hub
number: 8
inverted: True
- platform: gpio
id: "G2"
pin:
sn74hc595: sn74hc595_hub
number: 9
inverted: True
- platform: gpio
id: "G3"
pin:
sn74hc595: sn74hc595_hub
number: 10
inverted: True
- platform: gpio
id: "G4"
pin:
sn74hc595: sn74hc595_hub
number: 11
inverted: True
sn74hc165:
- id: sn74hc165_hub
clock_pin: GPIO17
data_pin: GPIO5
load_pin: GPIO16
sr_count: 1
binary_sensor:
- platform: gpio
name: "I1"
pin:
sn74hc165: sn74hc165_hub
# Use pin number 0
number: 0
inverted: true
- platform: gpio
name: "I2"
pin:
sn74hc165: sn74hc165_hub
# Use pin number 0
number: 1
inverted: true
- platform: gpio
name: "I3"
pin:
sn74hc165: sn74hc165_hub
# Use pin number 0
number: 2
inverted: true
- platform: gpio
name: "I4"
pin:
sn74hc165: sn74hc165_hub
# Use pin number 0
number: 3
inverted: true
- platform: gpio
name: "I5"
pin:
sn74hc165: sn74hc165_hub
# Use pin number 0
number: 4
inverted: true
- platform: gpio
name: "I6"
pin:
sn74hc165: sn74hc165_hub
# Use pin number 0
number: 5
inverted: true
- platform: gpio
name: "I7"
pin:
sn74hc165: sn74hc165_hub
# Use pin number 0
number: 6
inverted: true
- platform: gpio
name: "I8"
pin:
sn74hc165: sn74hc165_hub
# Use pin number 0
number: 7
inverted: true
- platform: gpio
name: "KEY1"
pin:
number: GPIO18
inverted: True
mode:
input: true
pullup: true
filters:
- delayed_off: 10ms
- platform: gpio
name: "KEY2"
pin:
number: GPIO19
inverted: True
mode:
input: true
pullup: true
filters:
- delayed_off: 10ms
- platform: gpio
name: "KEY3"
pin:
number: GPIO21
inverted: True
mode:
input: true
pullup: true
filters:
- delayed_off: 10ms
- platform: gpio
name: "KEY4"
pin:
number: GPIO23
inverted: True
mode:
input: true
pullup: true
filters:
- delayed_off: 10ms
sensor:
- platform: adc
pin: GPIO36
name: "ADC1 (0-20ma)"
update_interval: 60s
- platform: adc
pin: GPIO39
name: "ADC2 (0-20ma)"
update_interval: 60s
- platform: adc
pin: GPIO34
name: "ADC3 (0-20ma)"
update_interval: 60s
- platform: adc
pin: GPIO35
name: "ADC4 (0-20ma)"
update_interval: 60s
- platform: adc
pin: GPIO32
name: "ADC5 (0-10V)"
update_interval: 60s
- platform: adc
pin: GPIO33
name: "ADC6 (0-10V)"
update_interval: 60s
# no adc because we use wifi
# - platform: adc
# pin: GPIO25
# name: "ADC7"
# update_interval: 1s
# - platform: adc
# pin: GPIO26
# name: "ADC8"
# update_interval: 1s
captive_portal: