I’m trying to run two I2C digipots, the Adafruit DS3502 breakout boards.
I’m using the Adafruit DS3502 Arduino library to create a custom component and declare the digipots.
The problem: only one digipot is setup, always the second one (0x29 or 41). Reading the logs, it seems there is some kind of race condition but I can’t get my hands on it.
Any idea? Thanks!
First logs (emphasis mine)
INFO Successfully uploaded program.
INFO Starting log output from /dev/ttyUSB0 with baud rate 115200
[23:03:02][I][logger:243]: Log initialized
[23:03:02][C][ota:465]: There have been 0 suspected unsuccessful boot attempts.
--> [23:03:02][I][custom:016]: Initializing <40>
--> [23:03:02][I][custom\xfe[I][custom:035]: Found DS3502 chip at address <41>
[23:03:02][D][fan:091]: 'PC Fan 1' - Sending state:
[23:03:02][D][fan:092]: State: OFF
[23:03:02][D][fan:094]: Speed: 0
[23:03:02][I][custom:040]: Setting wiper of <40> to <0>
[23:03:02][I][custom:043]: --> Wiper value of <40> is now <0>
[23:03:02][D][fan:091]: 'PC Fan 2' - Sending state:
[23:03:02][D][fan:092]: State: OFF
[23:03:02][D][fan:094]: Speed: 0
[23:03:02][I][custom:040]: Setting wiper of <41> to <0>
[23:03:02][I][custom:043]: --> Wiper value of <41> is now <0>
config.yaml
esphome:
name: spacechimney
libraries:
- "Arduino"
- "Wire"
- "SPI"
- "Adafruit BusIO"
- "Adafruit DS3502"
includes:
- DS3502.h
# [...]
fan:
- platform: speed
id: pc_fan1
output: pc_fan_output1
name: "PC Fan 1"
- platform: speed
id: pc_fan2
output: pc_fan_output2
name: "PC Fan 2"
output:
- platform: custom
type: float
lambda: |-
auto digipot1 = new DS3502_Component(0x28);
auto digipot2 = new DS3502_Component(0x29);
App.register_component(digipot1);
App.register_component(digipot2);
return {digipot1, digipot2};
outputs:
- id: pc_fan_output1
- id: pc_fan_output2
DS3502.h
#include "esphome.h"
#include <Adafruit_DS3502.h>
#define WIPER_VALUE_PIN A0
class DS3502_Component : public Component, public FloatOutput
{
public:
int I2C_Address;
Adafruit_DS3502 ds3502;
DS3502_Component(int address = DS3502_I2CADDR_DEFAULT) {
I2C_Address = address;
ds3502 = Adafruit_DS3502();
ESP_LOGI("custom", "Initializing <%i>", I2C_Address);
}
void setup() override
{
ESP_LOGI("custom", "Setup for <%i>", I2C_Address);
Serial.begin(115200);
// Wait until serial port is opened
while (!Serial)
{
delay(1);
ESP_LOGI("custom", "<%i> waiting for serial...", I2C_Address);
}
if (!ds3502.begin(I2C_Address))
{
ESP_LOGI("custom", "Couldn't find DS3502 chip");
while (1);
}
ESP_LOGI("custom", "Found DS3502 chip at address <%i>", I2C_Address);
}
void write_state(float state) override {
int mappedState = map(int(state*100), 0, 100, 0, 127);
ESP_LOGI("custom", "Setting wiper of <%i> to <%i>", I2C_Address, mappedState);
ds3502.setWiper(mappedState);
int wiperValue = ds3502.getWiper();
ESP_LOGI("custom", "--> Wiper value of <%i> is now <%i>", I2C_Address, wiperValue);
}
};