{"id":59240,"date":"2025-05-21T17:07:53","date_gmt":"2025-05-21T16:07:53","guid":{"rendered":"https:\/\/www.microplanet.ma\/?post_type=product&#038;p=59240"},"modified":"2026-10-20T17:35:49","modified_gmt":"2026-10-20T17:35:49","slug":"ttgo-t-call-v1-4-esp32-gsm-gprs-sim800l","status":"publish","type":"product","link":"https:\/\/www.microplanet.ma\/en\/produit\/ttgo-t-call-v1-4-esp32-gsm-gprs-sim800l\/","title":{"rendered":"TTGO T-Call V1.4 ESP32 GSM\/GPRS Board with SIM800L"},"content":{"rendered":"<h3>TTGO T-Call V1.4 ESP32 Board with SIM800L GSM\/GPRS<\/h3>\n<p>Development board with dual-core ESP32, SIM800L cellular modem, Wi-Fi and Bluetooth. The SIM800L supports quad-band 2G GSM\/GPRS (850\/900\/1800\/1900MHz) as listed. This is not a 4G\/LTE modem. Confirm that a compatible 2G service is available from your local operator before buying.<\/p>\n<h4>Specifications stated in the listing<\/h4>\n<ul>\n<li>ESP32 dual-core Xtensa LX6, 32-bit, 240MHz<\/li>\n<li>Flash: 4MB; PSRAM: 8MB; SRAM: 520KB (listed)<\/li>\n<li>Modem: SIM800L quad-band GSM\/GPRS<\/li>\n<li>Wi-Fi 802.11 b\/g\/n; Bluetooth 4.2 BR\/EDR and BLE (listed)<\/li>\n<li>USB-C 5V\/1A; JST 1.25mm LiPo connector, 3.7\u20134.2V<\/li>\n<li>Integrated IP5306 charging circuit, 500mA as listed<\/li>\n<li>Dimensions: approximately 75 \u00d7 29 \u00d7 8mm; weight: approximately 12g<\/li>\n<li>Nano-SIM required; antenna is included\/required as listed\u2014verify package contents<\/li>\n<\/ul>\n<p>Cellular transmission draws high current peaks. Use a suitable battery or power source, observe battery polarity, and connect the GSM antenna before powering the modem. Do not operate the transmitter without an antenna. Check current 2G network availability and SIM activation with your operator.<\/p>\n<h4>Arduino SMS example<\/h4>\n<p>The example sends a text to a placeholder phone number. Replace the number and message with your own, and do not share personal credentials or numbers publicly.<\/p>\n<pre class=\"prism undefined-numbers lang-cpp\" data-lang=\"C++\"><code>#include &lt;TinyGsmClient.h&gt;\r\n\r\n#define MODEM_RST 5\r\n#define MODEM_PWRKEY 4\r\n#define MODEM_POWER_ON 23\r\n#define MODEM_TX 27\r\n#define MODEM_RX 26\r\n#define I2C_SDA 21\r\n#define I2C_SCL 22\r\n\r\n#define SerialMon Serial\r\n#define SerialAT Serial1\r\n\r\n#define TINY_GSM_MODEM_SIM800\r\n#define TINY_GSM_DEBUG SerialMon\r\n\r\nTinyGsm modem(SerialAT);\r\n\r\nvoid setup() {\r\n\/\/ Initialisation de la console\r\nSerialMon.begin(115200);\r\ndelay(10);\r\nSerialMon.println(\"Initialisation...\");\r\n\r\n\/\/ Mise sous tension du modem\r\npinMode(MODEM_PWRKEY, OUTPUT);\r\npinMode(MODEM_POWER_ON, OUTPUT);\r\ndigitalWrite(MODEM_PWRKEY, HIGH);\r\ndigitalWrite(MODEM_POWER_ON, HIGH);\r\ndelay(1000);\r\ndigitalWrite(MODEM_PWRKEY, LOW);\r\ndelay(1000);\r\n\r\n\/\/ Initialisation UART du modem\r\nSerialAT.begin(9600, SERIAL_8N1, MODEM_RX, MODEM_TX);\r\ndelay(3000);\r\n\r\n\/\/ Initialisation du modem\r\nSerialMon.println(\"Initialisation du modem...\");\r\nmodem.restart();\r\n\r\nString modemInfo = modem.getModemInfo();\r\nSerialMon.print(\"Modem: \");\r\nSerialMon.println(modemInfo);\r\n\r\n\/\/ V\u00e9rification de la carte SIM\r\nif (!modem.waitForNetwork()) {\r\nSerialMon.println(\"\u274c Pas de r\u00e9seau !\");\r\nreturn;\r\n}\r\n\r\nSerialMon.println(\"\u2705 R\u00e9seau d\u00e9tect\u00e9\");\r\n\r\n\/\/ Envoi du SMS\r\nString smsMessage = \"Hello from TTGO T-Call!\";\r\nString phoneNumber = \"+212600000000\"; \/\/ Remplacez par votre num\u00e9ro\r\n\r\nSerialMon.print(\"Envoi du SMS vers \");\r\nSerialMon.println(phoneNumber);\r\n\r\nif (modem.sendSMS(phoneNumber, smsMessage)) {\r\nSerialMon.println(\"\u2705 SMS envoy\u00e9 avec succ\u00e8s !\");\r\n} else {\r\nSerialMon.println(\"\u274c \u00c9chec de l\u2019envoi du SMS\");\r\n}\r\n}\r\n\r\nvoid loop() {\r\n\/\/ Rien \u00e0 faire ici\r\n}<\/code><\/pre>\n<p>The Arduino code block above is reproduced unchanged from the source.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>TTGO T-Call V1.4 with ESP32, SIM800L quad-band 2G GSM\/GPRS, Wi-Fi, Bluetooth and battery charging circuit.<\/p>\n","protected":false},"featured_media":59241,"template":"","meta":[],"product_brand":[],"product_cat":[314,334],"product_tag":[],"class_list":["post-59240","product","type-product","status-publish","has-post-thumbnail","product_cat-developpement-en","product_cat-cartes-de-developpement-en","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>TTGO T-Call V1.4 SIM800L ESP32 Board | MicroPlanet<\/title>\n<meta name=\"description\" content=\"ESP32 development board with SIM800L 2G GSM\/GPRS, Wi-Fi, Bluetooth and JST battery input. 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