12/6/2023 0 Comments Arduino delay with a loop![]() NOTE: This seems to be fixed in ESP32 Arduino 1.0.4, esp-idf 3. In the meantime, the below line seems to set sampling rate at ~47999.992Hz FIXME: There is a known issue with esp-idf and sampling rates, see: REG_SET_BIT(I2S_CONF_REG(I2S_PORT), I2S_RX_MSB_SHIFT) to fix MSB timing issues with some I2S microphones Undocumented (?!) manipulation of I2S peripheral registers I2s_driver_install(I2S_PORT, &i2s_config, 0, NULL) Mode: i2s_mode_t(I2S_MODE_MASTER | I2S_MODE_RX),īits_per_sample: i2s_bits_per_sample_t(SAMPLE_BITS),Ĭhannel_format: I2S_CHANNEL_FMT_ONLY_RIGHT,Ĭommunication_format: i2s_comm_format_t(I2S_COMM_FORMAT_I2S | I2S_COMM_FORMAT_I2S_MSB), seems to have swapped ONLY_LEFT and ONLY_RIGHT channels Calculate reference amplitude value at compile timeĬonstexpr double MIC_REF_AMPL = pow(10, double(MIC_SENSITIVITY) / 20) * ((1 1.0.3) #define MIC_TIMING_SHIFT 0 // Set to one to fix MSB timing for some microphones, i.e. #define MIC_CONVERT(s) (s > (SAMPLE_BITS - MIC_BITS)) #define MIC_BITS 24 // valid number of bits in I2S data #define MIC_NOISE_DB 29 // dB - Noise floor #define MIC_OVERLOAD_DB 116.0 // dB - Acoustic overload point #define MIC_REF_DB 94.0 // Value at which point sensitivity is specified in datasheet (dB) #define MIC_SENSITIVITY -26 // dBFS value expected at MIC_REF_DB (Sensitivity value from datasheet) Customize these values from microphone datasheet #define MIC_OFFSET_DB 3.0103 // Default offset (sine-wave RMS vs. ![]() #define MIC_EQUALIZER INMP441 // See below for defined IIR filters or set to 'None' to disable NOTE: Some microphones require at least DC-Blocker filter I am using a scope to see what is happening. #define DB_UNITS "dBA" // customize based on above weighting used Below in the function oneMillisecondDelay, delay (1) does generate a one millisecond delay, but in the function tenMillisecondDelay, delay (10) generates only a two millisecond delay. #define LEQ_UNITS "LAeq" // customize based on above weighting used #define WEIGHTING A_weighting // Also avaliable: 'C_weighting' or 'None' (Z_weighting) Hello, so ive made this sketch joining 2 diferent sketches, but it only show me wifi connected and the mic output on serial, i think is not going to run the loopĬonst char* mqttServer = "thingsboard.cloud" Ĭonst char* mqttUser = "soundmeter" //User nameĬonst char* mqttPassword = "esp32" //PasswordĬonst char* mqttClient = "soundmeteresp32" //IDĬonst int capacity = JSON_OBJECT_SIZE(21)
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