{"id":392,"date":"2026-06-10T22:29:12","date_gmt":"2026-06-10T14:29:12","guid":{"rendered":"https:\/\/projectleon.net\/make\/blog\/lora-audio-intercom-dac-esp32-farsi\/"},"modified":"2026-06-10T22:29:13","modified_gmt":"2026-06-10T14:29:13","slug":"lora-audio-intercom-dac-esp32-farsi","status":"publish","type":"post","link":"https:\/\/projectleon.net\/make\/blog\/lora-audio-intercom-dac-esp32-farsi\/","title":{"rendered":"\u0633\u0627\u062e\u062a \u0633\u06cc\u0633\u062a\u0645 \u067e\u062e\u0634 \u0635\u062f\u0627 \u0628\u06cc\u200c\u0633\u06cc\u0645 \u0628\u0627 LoRa \u0648 DAC: \u0627\u06cc\u0646\u062a\u0631\u06a9\u0627\u0645 \u062f\u0648\u200c\u0637\u0631\u0641\u0647 \u0628\u0631\u062f \u0628\u0644\u0646\u062f (\u0641\u0627\u0631\u0633\u06cc)"},"content":{"rendered":"
\n\u0627\u06cc\u0646\u062a\u0631\u06a9\u0627\u0645 \u0628\u06cc\u200c\u0633\u06cc\u0645 LoRa ESP32 DAC\n<\/div>\n
\n

\u0627\u06cc\u0646\u062a\u0631\u06a9\u0627\u0645 LoRa \u0648 I2S\/DAC \u06cc\u0639\u0646\u06cc \u0686\u0647\u061f (\u0628\u0631\u0627\u06cc \u0645\u0628\u062a\u062f\u06cc)<\/h2>\n

\u06cc\u06a9 \u0627\u06cc\u0646\u062a\u0631\u06a9\u0627\u0645<\/strong> \u06cc\u06a9 \u0633\u06cc\u0633\u062a\u0645 \u0627\u0631\u062a\u0628\u0627\u0637 \u0635\u0648\u062a\u06cc \u062f\u0648\u0637\u0631\u0641\u0647 \u0627\u0633\u062a. \u062f\u0631 \u0627\u06cc\u0646\u062a\u0631\u06a9\u0627\u0645\u200c\u0647\u0627\u06cc \u0631\u0627\u062f\u06cc\u0648\u06cc\u06cc \u0645\u0639\u0645\u0648\u0644 (\u0648\u0627\u06a9\u06cc\u200c\u062a\u0627\u06a9\u06cc) \u0635\u062f\u0627 \u0628\u0647 \u0635\u0648\u0631\u062a \u0622\u0646\u0627\u0644\u0648\u06af FM \u0627\u0631\u0633\u0627\u0644 \u0645\u06cc\u200c\u0634\u0648\u062f. \u0627\u0645\u0627 LoRa \u06cc\u06a9 \u0631\u0627\u062f\u06cc\u0648 \u062f\u06cc\u062c\u06cc\u062a\u0627\u0644 \u0627\u0633\u062a \u2014 \u0628\u0631\u0627\u06cc \u0627\u0631\u0633\u0627\u0644 \u0635\u062f\u0627 \u0628\u0627\u06cc\u062f \u0622\u0646 \u0631\u0627 \u0628\u0647 \u062f\u0627\u062f\u0647 \u062f\u06cc\u062c\u06cc\u062a\u0627\u0644 \u062a\u0628\u062f\u06cc\u0644 \u06a9\u0646\u06cc\u0645.<\/p>\n

I2S<\/strong> (Inter-IC Sound) \u06cc\u06a9 \u067e\u0631\u0648\u062a\u06a9\u0644 \u0635\u0648\u062a\u06cc \u062f\u06cc\u062c\u06cc\u062a\u0627\u0644 \u0627\u0633\u062a. \u0645\u06cc\u06a9\u0631\u0648\u0641\u0648\u0646 I2S (\u0645\u062b\u0644 INMP441) \u0635\u062f\u0627 \u0631\u0627 \u0645\u0633\u062a\u0642\u06cc\u0645\u0627\u064b \u0628\u0647 \u0627\u0639\u062f\u0627\u062f \u062f\u06cc\u062c\u06cc\u062a\u0627\u0644 \u062a\u0628\u062f\u06cc\u0644 \u0645\u06cc\u200c\u06a9\u0646\u062f. DAC<\/strong> (Digital-to-Analog Converter) \u062f\u0631 \u0633\u0645\u062a \u06af\u06cc\u0631\u0646\u062f\u0647 \u0627\u06cc\u0646 \u0627\u0639\u062f\u0627\u062f \u0631\u0627 \u062f\u0648\u0628\u0627\u0631\u0647 \u0628\u0647 \u0635\u062f\u0627 \u062a\u0628\u062f\u06cc\u0644 \u0645\u06cc\u200c\u06a9\u0646\u062f. ESP32 \u0647\u0645 \u06cc\u06a9 DAC \u0622\u0646\u0627\u0644\u0648\u06af \u062f\u0627\u062e\u0644\u06cc \u06f8 \u0628\u06cc\u062a\u06cc \u062f\u0627\u0631\u062f \u06a9\u0647 \u0628\u0631\u0627\u06cc \u0627\u06cc\u0646 \u067e\u0631\u0648\u0698\u0647 \u06a9\u0627\u0641\u06cc \u0627\u0633\u062a.<\/p>\n

\u06a9\u06cc\u0641\u06cc\u062a \u0635\u062f\u0627 \u062f\u0631 \u06f8kHz Sample Rate \u0642\u0627\u0628\u0644 \u0641\u0647\u0645 \u0627\u0633\u062a (\u0645\u062b\u0644 \u0635\u062f\u0627\u06cc \u062a\u0644\u0641\u0646). LoRa \u0628\u0627 Bandwidth 250kHz \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0627\u06cc\u0646 \u062c\u0631\u06cc\u0627\u0646 \u062f\u0627\u062f\u0647 \u0631\u0627 \u062a\u0627 \u06f1+ \u06a9\u06cc\u0644\u0648\u0645\u062a\u0631 \u062d\u0645\u0644 \u06a9\u0646\u062f.<\/p>\n<\/div>\n

\n

\u0645\u062d\u0635\u0648\u0644\u06cc \u06a9\u0647 \u0645\u06cc\u200c\u0633\u0627\u0632\u06cc\u062f<\/h2>\n

\u06cc\u06a9 \u0627\u06cc\u0646\u062a\u0631\u06a9\u0627\u0645 \u062f\u0648\u200c\u0637\u0631\u0641\u0647 \u0628\u06cc\u200c\u0633\u06cc\u0645<\/strong> \u0628\u062f\u0648\u0646 \u0627\u06cc\u0646\u062a\u0631\u0646\u062a\u060c \u0628\u0631\u062f \u062a\u0627 \u06f1 \u06a9\u06cc\u0644\u0648\u0645\u062a\u0631.<\/p>\n

    \n
  • \u0632\u0645\u0627\u0646 \u0633\u0627\u062e\u062a:<\/strong> \u06f4 \u062a\u0627 \u06f6 \u0633\u0627\u0639\u062a<\/li>\n
  • \u0647\u0632\u06cc\u0646\u0647:<\/strong> \u06f1 \u062a\u0627 \u06f1.\u06f5 \u0645\u06cc\u0644\u06cc\u0648\u0646 \u062a\u0648\u0645\u0627\u0646<\/li>\n
  • \u06a9\u06cc\u0641\u06cc\u062a \u0635\u062f\u0627:<\/strong> \u06f8kHz \u2014 \u0642\u0627\u0628\u0644 \u0641\u0647\u0645 \u06a9\u0627\u0645\u0644<\/li>\n<\/ul>\n<\/div>\n

    \n\n\n\u062f\u0633\u062a\u06af\u0627\u0647 A<\/text>\nINMP441 + ESP32<\/text>\nLoRa TX<\/text>\n\u062f\u0633\u062a\u06af\u0627\u0647 B<\/text>\nESP32 DAC<\/text>\nLoRa RX + \u0627\u0633\u067e\u06cc\u06a9\u0631<\/text>\n\n\n\n433MHz<\/text>\n\u0647\u0631 \u062f\u0633\u062a\u06af\u0627\u0647 \u0647\u0645\u0632\u0645\u0627\u0646 \u0641\u0631\u0633\u062a\u0646\u062f\u0647 \u0648 \u06af\u06cc\u0631\u0646\u062f\u0647 \u2014 Half-Duplex \u0628\u0627 PTT<\/text>\n<\/svg><\/p>\n

    \u0642\u0637\u0639\u0627\u062a \u0644\u0627\u0632\u0645 (BOM)<\/h2>\n\n\n\n\n\n\n\n\n\n
    \u0642\u0637\u0639\u0647<\/th>\n\u062a\u0639\u062f\u0627\u062f<\/th>\n<\/tr>\n<\/thead>\n
    TTGO LoRa32 (ESP32 + LoRa)<\/td>\n\u06f2 \u0639\u062f\u062f<\/td>\n<\/tr>\n
    \u0645\u06cc\u06a9\u0631\u0648\u0641\u0648\u0646 I2S INMP441<\/td>\n\u06f2 \u0639\u062f\u062f<\/td>\n<\/tr>\n
    \u0627\u0633\u067e\u06cc\u06a9\u0631 \u06f8\u03a9 0.5W<\/td>\n\u06f2 \u0639\u062f\u062f<\/td>\n<\/tr>\n
    \u0622\u0645\u067e\u0644\u06cc\u200c\u0641\u0627\u06cc\u0631 PAM8403 Mini<\/td>\n\u06f2 \u0639\u062f\u062f<\/td>\n<\/tr>\n
    \u062f\u06a9\u0645\u0647 PTT<\/td>\n\u06f2 \u0639\u062f\u062f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u06a9\u062f ESP32 \u2014 \u0641\u0631\u0633\u062a\u0646\u062f\u0647 (\u0636\u0628\u0637 \u0648 \u0627\u0631\u0633\u0627\u0644)<\/h2>\n
    \n#include <SPI.h>\n#include <LoRa.h>\n#include <driver\/i2s.h>\n\n#define SAMPLE_RATE   8000\n#define I2S_NUM       I2S_NUM_0\n#define I2S_WS        25\n#define I2S_SCK       26\n#define I2S_SD        22\n#define PTT_PIN       0\n\nconst i2s_config_t i2s_cfg = {\n  .mode = (i2s_mode_t)(I2S_MODE_MASTER | I2S_MODE_RX),\n  .sample_rate = SAMPLE_RATE,\n  .bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT,\n  .channel_format = I2S_CHANNEL_FMT_ONLY_LEFT,\n  .communication_format = I2S_COMM_FORMAT_I2S,\n  .intr_alloc_flags = 0, .dma_buf_count = 4, .dma_buf_len = 64\n};\n\nvoid setup() {\n  pinMode(PTT_PIN, INPUT_PULLUP);\n  i2s_driver_install(I2S_NUM, &i2s_cfg, 0, NULL);\n  i2s_set_pin(I2S_NUM, &(i2s_pin_config_t){I2S_SCK, I2S_WS, -1, I2S_SD});\n  LoRa.begin(433E6);\n  LoRa.setSpreadingFactor(7);\n  LoRa.setSignalBandwidth(250E3);\n}\n\nvoid loop() {\n  if (digitalRead(PTT_PIN) == LOW) {\n    int16_t samples[32]; size_t bytesRead;\n    i2s_read(I2S_NUM, samples, sizeof(samples), &bytesRead, portMAX_DELAY);\n    \/\/ \u062a\u0628\u062f\u06cc\u0644 \u06f1\u06f6 \u0628\u06cc\u062a \u0628\u0647 \u06f8 \u0628\u06cc\u062a \u0628\u0631\u0627\u06cc \u0641\u0634\u0631\u062f\u0647\u200c\u0633\u0627\u0632\u06cc\n    uint8_t compressed[16];\n    for(int i=0;i<16;i++) compressed[i]=(samples[i]>>8)+128;\n    LoRa.beginPacket();\n    LoRa.write(compressed, 16);\n    LoRa.endPacket(true);  \/\/ async\n  }\n}\n<\/code><\/pre>\n
    \u0686\u06a9\u200c\u0644\u06cc\u0633\u062a \u062a\u0633\u062a<\/h2>\n\n\n\n\n\n\n\n\n
    \u062a\u0633\u062a<\/th>\n\u0646\u062a\u06cc\u062c\u0647<\/th>\n<\/tr>\n<\/thead>\n
    \u0645\u06cc\u06a9\u0631\u0648\u0641\u0648\u0646 I2S \u062f\u0631 Serial Plotter \u0633\u06cc\u06af\u0646\u0627\u0644 \u062f\u0627\u0631\u062f\u061f<\/td>\n\u0628\u0644\u0647 \u2014 \u0645\u0648\u062c \u0635\u062f\u0627 \u062f\u06cc\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f<\/td>\n<\/tr>\n
    DAC \u0627\u0633\u067e\u06cc\u06a9\u0631 \u062f\u0631 \u0647\u0645\u0627\u0646 \u0627\u062a\u0627\u0642 \u0635\u062f\u0627 \u0645\u06cc\u200c\u062f\u0647\u062f\u061f<\/td>\n\u0628\u0644\u0647 \u2014 \u0642\u0627\u0628\u0644 \u0641\u0647\u0645<\/td>\n<\/tr>\n
    \u062f\u0631 \u0641\u0627\u0635\u0644\u0647 \u06f2\u06f0\u06f0 \u0645\u062a\u0631 \u0635\u062f\u0627 \u0648\u0627\u0636\u062d \u0627\u0633\u062a\u061f<\/td>\n\u0628\u0644\u0647<\/td>\n<\/tr>\n
    \u062a\u0623\u062e\u06cc\u0631 \u06a9\u0645\u062a\u0631 \u0627\u0632 \u06f2 \u062b\u0627\u0646\u06cc\u0647 \u0627\u0633\u062a\u061f<\/td>\n\u0628\u0644\u0647 \u2014 ~\u06f5\u06f0\u06f0ms<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \n\n\n\n\n\n\n\n\u0645\u06cc\u06a9\u0631\u0648\u0641\u0648\u0646 I2S<\/text>\nINMP441<\/text>\nESP32 + LoRa<\/text>\n\u0641\u0634\u0631\u062f\u0647\u200c\u0633\u0627\u0632\u06cc<\/text>\nLoRa \u06af\u06cc\u0631\u0646\u062f\u0647<\/text>\nESP32 DAC<\/text>\nPAM8403<\/text>\n\u0627\u0633\u067e\u06cc\u06a9\u0631 \u06f8\u03a9<\/text>\n\u0627\u06cc\u0646\u062a\u0631\u06a9\u0627\u0645 LoRa \u2014 \u0635\u062f\u0627\u06cc \u062f\u06cc\u062c\u06cc\u062a\u0627\u0644 \u0628\u062f\u0648\u0646 \u0627\u06cc\u0646\u062a\u0631\u0646\u062a \u2014 \u06f1 \u06a9\u06cc\u0644\u0648\u0645\u062a\u0631<\/text>\n<\/svg><\/p>\n
    \u0648\u06cc\u062f\u0626\u0648\u0647\u0627\u06cc \u0622\u0645\u0648\u0632\u0634\u06cc<\/h2>\n
    \n