Project Idea Start
Image
Image
Thought for 37 sec
That identifies it: it’s a WEMOS D1 R32 V1.0.0, an Arduino Uno-form-factor ESP32 board. I’ll update the carrier design to use its shield-header pinout and mechanical pattern.
Worked for 2 mins 26 sec
The photos confirm your board is a WEMOS D1 R32 V1.0.0, using the Arduino Uno-style shield connector layout—not the current 38-pin ESP32 DevKit footprint.
The existing sensor-carrier schematic remains intact. The following update is still pending because no ACUs are currently available:
- Replace the ESP32 DevKit interface with D1 R32 shield headers
- Verify and remap the sensor GPIO connections
- Apply the Arduino Uno R3 mechanical header pattern
- Update the specification, firmware, and bring-up files
- Re-run ERC/connectivity checks
No partial replacement was made, so the current schematic has not been left broken.
Map sensor GPIOs
Find D1 R32 footprint
Show header pinout
Check pin conflicts
Update requirements
Refine this doc
Ask about this doc
Firmware Getting Started
Toolchain
PlatformIO with framework
arduino and board esp32dev. Add adafruit/DHT sensor library and plerup/EspSoftwareSerial dependencies.Ini
[env:esp32dev] platform = espressif32 board = esp32dev framework = arduino monitor_speed = 115200 lib_deps = adafruit/DHT sensor library plerup/EspSoftwareSerial
Pin map
Cpp
constexpr int BHA_RX=16, BHA_TX=17; constexpr int FDA_RX=22, FDA_TX=23; constexpr int I2S_BCLK=14, I2S_WS=25, I2S_SD=32; constexpr int MQ2_ADC=34, DHT_PIN=27; constexpr int XIAO_RX=33, XIAO_TX=13;
Compilable Arduino starter
Cpp
#include <Arduino.h> #include <driver/i2s.h> #include <DHT.h> #include <SoftwareSerial.h> constexpr int BHA_RX=16, BHA_TX=17; constexpr int FDA_RX=22, FDA_TX=23; constexpr int I2S_BCLK=14, I2S_WS=25, I2S_SD=32; constexpr int MQ2_ADC=34, DHT_PIN=27; constexpr int XIAO_RX=33, XIAO_TX=13; HardwareSerial RadarBHA(1); HardwareSerial RadarFDA(2); SoftwareSerial XiaoUart; DHT dht(DHT_PIN, DHT11); void setupI2S() { i2s_config_t cfg{}; cfg.mode = (i2s_mode_t)(I2S_MODE_MASTER | I2S_MODE_RX); cfg.sample_rate = 16000; cfg.bits_per_sample = I2S_BITS_PER_SAMPLE_32BIT; cfg.channel_format = I2S_CHANNEL_FMT_ONLY_LEFT; cfg.communication_format = I2S_COMM_FORMAT_STAND_I2S; cfg.intr_alloc_flags = ESP_INTR_FLAG_LEVEL1; cfg.dma_buf_count = 4; cfg.dma_buf_len = 128; cfg.use_apll = false; cfg.tx_desc_auto_clear = false; cfg.fixed_mclk = 0; i2s_pin_config_t pins{I2S_BCLK, I2S_WS, I2S_PIN_NO_CHANGE, I2S_SD}; i2s_driver_install(I2S_NUM_0, &cfg, 0, nullptr); i2s_set_pin(I2S_NUM_0, &pins); } void setup() { Serial.begin(115200); // UART0: laptop debug only RadarBHA.begin(1382400, SERIAL_8N1, BHA_RX, BHA_TX); RadarFDA.begin(115200, SERIAL_8N1, FDA_RX, FDA_TX); XiaoUart.begin(115200, SWSERIAL_8N1, XIAO_RX, XIAO_TX, false); analogSetPinAttenuation(MQ2_ADC, ADC_11db); dht.begin(); setupI2S(); } void loop() { // Raw radar pass-through: no undocumented packet interpretation. while (RadarBHA.available()) Serial.write(RadarBHA.read()); while (RadarFDA.available()) Serial.write(RadarFDA.read()); while (XiaoUart.available()) Serial.write(XiaoUart.read()); static uint32_t last=0; if (millis()-last >= 2000) { last=millis(); int raw=analogRead(MQ2_ADC); float t=dht.readTemperature(), h=dht.readHumidity(); Serial.printf("MQ2 raw=%d DHT11 T=%.1fC RH=%.1f%%\n", raw, t, h); int32_t samples[128]; size_t bytes=0; if (i2s_read(I2S_NUM_0, samples, sizeof(samples), &bytes, pdMS_TO_TICKS(20))==ESP_OK) Serial.printf("I2S bytes=%u first=%ld\n", (unsigned)bytes, (long)samples[0]); } }
Startup sequence
- Power with a current-limited 5 V supply and verify rails.
- Start UART0 logging.
- Initialize both hardware UARTs, software UART, ADC, DHT11, then I2S.
- Confirm raw bytes before adding vendor protocol parsers.
- Calibrate MQ-2 only after heater burn-in and with an appropriate reference procedure.
Toolchain
Pin map
Compilable Arduino starter
Startup sequence
