Hi, guys!
I have an Arduino UNO to which an ORP sensor is connected. I am transmitting data via UART to ESP32 (ESP Home). To do this, I use a Custom UART Text Sensor. Everything is displayed well in the Home Assistant. But I can’t figure out how to replace the code in order to get a numeric value.
I would be grateful if someone could help me…
YAML
esphome:
name: uart-orp
includes:
- uart_orp.h
esp32:
board: esp32dev
framework:
type: arduino
# Enable logging
logger:
level: VERBOSE #makes uart stream available in esphome logstream
baud_rate: 0 #disable logging over uart
uart:
id: uart_bus
tx_pin: GPIO17
rx_pin: GPIO16
baud_rate: 9600
# Enable Home Assistant API
api:
encryption:
key: ""
ota:
password: ""
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
# Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: "Uart-Orp Fallback Hotspot"
password: "bGKBD3U2Neox"
text_sensor:
- platform: custom
lambda: |-
auto my_custom_sensor = new UartReadLineSensor(id(uart_bus));
App.register_component(my_custom_sensor);
return {my_custom_sensor};
text_sensors:
id: "uart_readline"
name: "ORP Sensor"
uart_orp.h
#include "esphome.h"
class UartReadLineSensor : public Component, public UARTDevice, public TextSensor {
public:
UartReadLineSensor(UARTComponent *parent) : UARTDevice(parent) {}
void setup() override {
// nothing to do here
}
int readline(int readch, char *buffer, int len)
{
static int pos = 0;
int rpos;
if (readch > 0) {
switch (readch) {
case '\n': // Ignore new-lines
break;
case '\r': // Return on CR
rpos = pos;
pos = 0; // Reset position index ready for next time
return rpos;
default:
if (pos < len-1) {
buffer[pos++] = readch;
buffer[pos] = 0;
}
}
}
// No end of line has been found, so return -1.
return -1;
}
void loop() override {
const int max_line_length = 80;
static char buffer[max_line_length];
while (available()) {
if(readline(read(), buffer, max_line_length) > 0) {
publish_state(buffer);
}
}
}
};
