{"id":575,"date":"2026-06-11T13:06:13","date_gmt":"2026-06-11T05:06:13","guid":{"rendered":"https:\/\/projectleon.net\/make\/blog\/digital-walkie-talkie-sa818-esp32-vhf-uhf-farsi\/"},"modified":"2026-06-11T13:06:14","modified_gmt":"2026-06-11T05:06:14","slug":"digital-walkie-talkie-sa818-esp32-vhf-uhf-farsi","status":"publish","type":"post","link":"https:\/\/projectleon.net\/make\/blog\/digital-walkie-talkie-sa818-esp32-vhf-uhf-farsi\/","title":{"rendered":"\u0633\u0627\u062e\u062a Walkie-Talkie \u062f\u06cc\u062c\u06cc\u062a\u0627\u0644 \u0628\u0627 SA818 \u0648 ESP32: \u0635\u062f\u0627\u06cc FM \u0628\u0627\u0646\u062f VHF\/UHF (\u0641\u0627\u0631\u0633\u06cc)"},"content":{"rendered":"
\nSA818 \u0648\u0627\u06a9\u06cc\u200c\u062a\u0627\u06a9\u06cc ESP32 VHF UHF \u0633\u0627\u062e\u062a\n<\/div>\n
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SA818 \u0648 \u0648\u0627\u06a9\u06cc\u200c\u062a\u0627\u06a9\u06cc \u062f\u06cc\u062c\u06cc\u062a\u0627\u0644 \u0686\u06cc\u0633\u062a\u061f (\u0645\u0628\u062a\u062f\u06cc)<\/h2>\n

\u0645\u0627\u0698\u0648\u0644 SA818<\/strong> \u06cc\u06a9 \u062a\u0631\u0627\u0646\u0633\u06cc\u0648\u0631 \u0641\u0634\u0631\u062f\u0647 VHF (136-174MHz) \u06cc\u0627 UHF (400-480MHz) \u0628\u0627 \u0642\u06cc\u0645\u062a \u06f1\u06f5-\u06f2\u06f0 \u062f\u0644\u0627\u0631 \u0627\u0633\u062a. \u0627\u06cc\u0646 \u0645\u0627\u0698\u0648\u0644 \u06cc\u06a9 \u0631\u0627\u062f\u06cc\u0648\u06cc FM \u06a9\u0627\u0645\u0644 \u062f\u0631 \u0627\u0628\u0639\u0627\u062f \u06f3\u06f8\u00d7\u06f3\u06f8mm \u0627\u0633\u062a \u2014 \u0645\u06cc\u06a9\u0631\u0648\u0641\u0648\u0646\u060c \u0628\u0644\u0646\u062f\u06af\u0648\u060c \u0648 \u06a9\u0646\u062a\u0631\u0644 \u0627\u0632 \u0637\u0631\u06cc\u0642 UART \u0628\u0627 AT Commands.<\/p>\n

\u0628\u0627 \u0648\u0635\u0644 \u06a9\u0631\u062f\u0646 SA818 \u0628\u0647 ESP32 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u06cc\u06a9 \u0648\u0627\u06a9\u06cc\u200c\u062a\u0627\u06a9\u06cc \u0647\u0648\u0634\u0645\u0646\u062f \u0633\u0627\u062e\u062a \u06a9\u0647 \u0641\u0631\u06a9\u0627\u0646\u0633 \u0648 CTCSS (\u06a9\u062f \u062c\u062f\u0627\u0633\u0627\u0632\u06cc) \u0631\u0627 \u0628\u0647 \u0635\u0648\u0631\u062a \u062f\u06cc\u062c\u06cc\u062a\u0627\u0644 \u062a\u0646\u0638\u06cc\u0645 \u06a9\u0646\u062f\u060c PTT (Push-to-Talk) \u0631\u0627 \u06a9\u0646\u062a\u0631\u0644 \u06a9\u0646\u062f\u060c \u0648 \u062d\u062a\u06cc \u0627\u0632 \u0637\u0631\u06cc\u0642 WiFi \u06cc\u0627 Meshtastic \u0635\u062f\u0627 \u0631\u0627 \u0628\u0647 \u0634\u0628\u06a9\u0647 \u062a\u0628\u062f\u06cc\u0644 \u06a9\u0646\u062f.<\/p>\n<\/div>\n

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

\u0648\u0627\u06a9\u06cc\u200c\u062a\u0627\u06a9\u06cc \u062f\u06cc\u062c\u06cc\u062a\u0627\u0644 UHF \u0628\u0627 \u0635\u0641\u062d\u0647 OLED\u060c \u062a\u0646\u0638\u06cc\u0645 \u0641\u0631\u06a9\u0627\u0646\u0633\u060c \u0648 \u06f5 \u067e\u06cc\u0634\u200c\u062a\u0646\u0638\u06cc\u0645 \u06a9\u0627\u0646\u0627\u0644.<\/p>\n

    \n
  • \u0647\u0632\u06cc\u0646\u0647:<\/strong> \u06f1 \u062a\u0627 \u06f2 \u0645\u06cc\u0644\u06cc\u0648\u0646 \u062a\u0648\u0645\u0627\u0646<\/li>\n
  • \u0628\u0631\u062f:<\/strong> \u06f3-\u06f5km \u062f\u0631 \u0641\u0636\u0627\u06cc \u0628\u0627\u0632<\/li>\n
  • \u0628\u0627\u0646\u062f:<\/strong> UHF 400-480MHz<\/li>\n<\/ul>\n<\/div>\n

    \n\n\u0648\u0627\u06a9\u06cc\u200c\u062a\u0627\u06a9\u06cc SA818+ESP32<\/text>\n\nSA818 UHF<\/text>\n\nESP32<\/text>\n\nOLED<\/text>\n\n\n\nUHF FM<\/text>\n\n\u0648\u0627\u06a9\u06cc\u200c\u062a\u0627\u06a9\u06cc \u062f\u0648\u0645<\/text>\n\nSA818 UHF<\/text>\n\nESP32<\/text>\nSA818 \u0648\u0627\u06a9\u06cc\u200c\u062a\u0627\u06a9\u06cc \u2014 UHF FM\u060c \u06f5km\u060c CTCSS\u060c PTT<\/text>\n<\/svg><\/p>\n

    \u0633\u06cc\u0645\u200c\u0628\u0646\u062f\u06cc SA818 \u0628\u0647 ESP32<\/h2>\n
    \nSA818    \u2192 ESP32\nVCC      \u2192 5V (\u0645\u0647\u0645: SA818 \u0646\u06cc\u0627\u0632 \u0628\u0647 3.7-4.5V \u062f\u0627\u0631\u062f\u060c LDO \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f)\nGND      \u2192 GND\nTXD      \u2192 GPIO16 (RX2)\nRXD      \u2192 GPIO17 (TX2) \u0627\u0632 \u0637\u0631\u06cc\u0642 \u0645\u0642\u0633\u0645 3.3V\nPTT      \u2192 GPIO4 (LOW=TX, HIGH=RX)\nPD       \u2192 GPIO5 (LOW=Power Down)\nSQ       \u2192 GPIO18 (Squelch output)\nMIC+     \u2192 INMP441 I2S \u06cc\u0627 \u0645\u06cc\u06a9\u0631\u0648\u0641\u0648\u0646 3.5mm\nSPK      \u2192 \u0628\u0644\u0646\u062f\u06af\u0648 8\u03a9 \u0627\u0632 \u0637\u0631\u06cc\u0642 \u062e\u0627\u0632\u0646 100\u03bcF\n<\/code><\/pre>\n
    \u06a9\u062f \u06a9\u0627\u0645\u0644 \u0648\u0627\u06a9\u06cc\u200c\u062a\u0627\u06a9\u06cc<\/h2>\n
    \n#include <HardwareSerial.h>\nHardwareSerial sa818(2);  \/\/ UART2\n\nconst int PTT=4, SQ=18, PD=5;\nbool isTransmitting = false;\n\nvoid sa818Config(float txFreq, float rxFreq, int ctcss=0) {\n  \/\/ \u0641\u0631\u0645\u062a: AT+DMOSETGROUP=BW,TX,RX,TX_CTCSS,SQ,RX_CTCSS\n  char cmd[80];\n  sprintf(cmd, \"AT+DMOSETGROUP=0,%07.4f,%07.4f,%04d,1,%04d\\r\\n\",\n    txFreq, rxFreq, ctcss, ctcss);\n  sa818.print(cmd);\n  delay(100);\n  \/\/ \u067e\u0627\u0633\u062e: +DMOSETGROUP:0  (OK)\n}\n\nvoid startTX() {\n  digitalWrite(PTT, LOW);   \/\/ \u0641\u0639\u0627\u0644\u200c\u0633\u0627\u0632\u06cc TX\n  isTransmitting = true;\n  Serial.println(\"TX \u0641\u0639\u0627\u0644\");\n}\n\nvoid stopTX() {\n  digitalWrite(PTT, HIGH);  \/\/ \u0628\u0631\u06af\u0634\u062a \u0628\u0647 RX\n  isTransmitting = false;\n  Serial.println(\"RX \u0641\u0639\u0627\u0644\");\n}\n\nvoid setup() {\n  Serial.begin(115200);\n  sa818.begin(9600, SERIAL_8N1, 16, 17);\n  pinMode(PTT, OUTPUT); digitalWrite(PTT, HIGH);\n  pinMode(PD, OUTPUT);  digitalWrite(PD, HIGH);\n  pinMode(SQ, INPUT);\n\n  delay(2000);  \/\/ \u0627\u0646\u062a\u0638\u0627\u0631 \u0628\u0631\u0627\u06cc SA818\n  sa818Config(433.5000, 433.5000, 0);  \/\/ \u0641\u0631\u06a9\u0627\u0646\u0633 UHF\n  sa818.println(\"AT+DMOSETVOLUME=4\");  \/\/ \u062d\u062c\u0645 \u0635\u062f\u0627\n  Serial.println(\"SA818 \u0622\u0645\u0627\u062f\u0647\");\n}\n\nvoid loop() {\n  \/\/ \u062f\u06a9\u0645\u0647 PTT \u0631\u0648\u06cc GPIO0\n  if(!digitalRead(0)) {\n    if(!isTransmitting) startTX();\n  } else {\n    if(isTransmitting) stopTX();\n  }\n\n  \/\/ \u0646\u0645\u0627\u06cc\u0634 Squelch\n  if(digitalRead(SQ) == LOW && !isTransmitting)\n    Serial.println(\"\u0633\u06cc\u06af\u0646\u0627\u0644 \u062f\u0631\u06cc\u0627\u0641\u062a...\");\n}\n<\/code><\/pre>\n
    \u06a9\u0627\u0646\u0627\u0644\u200c\u0647\u0627\u06cc \u067e\u06cc\u0634\u200c\u062a\u0646\u0638\u06cc\u0645 VHF\/UHF \u0627\u06cc\u0631\u0627\u0646<\/h2>\n\n\n\n\n\n\n\n\n
    \u06a9\u0627\u0646\u0627\u0644<\/th>\n\u0641\u0631\u06a9\u0627\u0646\u0633<\/th>\n\u06a9\u0627\u0631\u0628\u0631\u062f<\/th>\n<\/tr>\n<\/thead>\n
    Ch1 Amateur<\/td>\n433.500 MHz<\/td>\n\u0631\u0627\u062f\u06cc\u0648\u0622\u0645\u0627\u062a\u0648\u0631 \u062a\u0645\u0627\u0633<\/td>\n<\/tr>\n
    PMR446<\/td>\n446.006-446.200<\/td>\n\u0648\u0627\u06a9\u06cc\u200c\u062a\u0627\u06a9\u06cc \u0639\u0645\u0648\u0645\u06cc<\/td>\n<\/tr>\n
    UGV Team<\/td>\n462.000 MHz<\/td>\n\u0627\u0631\u062a\u0628\u0627\u0637 \u062a\u06cc\u0645 \u0645\u06cc\u062f\u0627\u0646\u06cc<\/td>\n<\/tr>\n
    Repeater Out<\/td>\n145.000 MHz<\/td>\n\u0631\u067e\u06cc\u062a\u0631 VHF (\u0646\u06cc\u0627\u0632 \u0645\u062c\u0648\u0632)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \n\n\n\n\n\n\n\n\u062f\u06a9\u0645\u0647 PTT<\/text>\nESP32<\/text>\nSA818 UHF<\/text>\nFM TX\/RX<\/text>\n\u0622\u0646\u062a\u0646 \u00bc\u03bb<\/text>\n\u06f1\u06f6.\u06f7cm<\/text>\n\u06f5km FM<\/text>\n\u0635\u062f\u0627\u06cc \u0648\u0627\u0636\u062d<\/text>\nSA818 Walkie \u2014 ESP32 PTT \u2192 SA818 UHF \u2192 \u06f5km FM \u0635\u062f\u0627<\/text>\n<\/svg><\/p>\n
    \u0648\u06cc\u062f\u0626\u0648\u0647\u0627\u06cc \u0622\u0645\u0648\u0632\u0634\u06cc<\/h2>\n
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