{"id":58622,"date":"2022-06-29T14:19:27","date_gmt":"2022-06-29T13:19:27","guid":{"rendered":"https:\/\/www.microplanet.ma\/?post_type=product&#038;p=58622"},"modified":"2026-10-20T16:00:32","modified_gmt":"2026-10-20T16:00:32","slug":"sim800a-gsm-gprs-modem-board-rs232","status":"publish","type":"product","link":"https:\/\/www.microplanet.ma\/en\/produit\/sim800a-gsm-gprs-modem-board-rs232\/","title":{"rendered":"SIM800A GSM\/GPRS Modem Board, RS232"},"content":{"rendered":"<h3>SIM800A GSM\/GPRS Modem Board<\/h3>\n<p>This board uses the SIM800A GSM\/GPRS modem and provides serial connections for use with a computer or microcontroller. The listing describes voice, SMS and data functions, an onboard SIM holder, network-status LED, TCP\/IP stack for GPRS, low-battery indication, and an external antenna connector.<\/p>\n<p><strong>Band compatibility:<\/strong> the board listing claims GSM 850\/900\/1800\/1900 MHz. SIMCom\u2019s SIM800A product documentation identifies the SIM800A modem itself as dual-band 900\/1800 MHz. The board description and modem variant may not match; verify the modem marking, regional variant and supported bands before purchase. Operation also requires a compatible 2G GSM network and SIM service in your location; availability depends on the operator and may change.<\/p>\n<h4>Board specifications listed<\/h4>\n<ul>\n<li>GSM bands claimed by this listing: 850, 900, 1800 and 1900 MHz<\/li>\n<li>GPRS: class 2\/10 (as listed)<\/li>\n<li>Coding schemes: CS-1 to CS-4<\/li>\n<li>Transmit power listed: Class 4 (2 W), Class 1 (1 W)<\/li>\n<li>Control: AT commands, including 3GPP TS 27.007\/27.005 and SIMCom extensions<\/li>\n<li>Board input: 9\u201312 V DC, with at least 2 A peak-current capability (as listed)<\/li>\n<li>Serial interface: board listing describes 5 V MCU communication, TTL RX\/TX and DB9 RS232; confirm the exact connector and voltage levels before wiring<\/li>\n<li>Configurable baud rate; 9600 baud is stated as the default<\/li>\n<li>Weight: 40 g<\/li>\n<li>Operating temperature: \u221240 to +85 \u00b0C (as listed)<\/li>\n<li>Antenna: external finger-style antenna connector<\/li>\n<\/ul>\n<p>The SIM800A modem chip itself uses a 3.4\u20134.4 V supply and can require up to 2 A peak during transmission, according to SIMCom\u2019s hardware design guide. The board\u2019s listed 9\u201312 V input is for the carrier board and must not be applied directly to the modem\u2019s VBAT pins. Check the board schematic, polarity, regulator and serial logic levels before connecting.<\/p>\n<h4>Basic serial use<\/h4>\n<p>Connect the modem to a computer through a suitable USB-to-serial adapter or connect it to a microcontroller through a correctly voltage-matched serial interface. Select the adapter\u2019s COM port in Device Manager, then open a terminal at the configured baud rate (the listing gives 9600 baud as default). Send AT commands terminated with a carriage return; for example, the source gives <code>AT\\r<\/code>. A working modem typically returns <code>OK<\/code> for a supported test command. The listing says its interface follows the SIMCom AT command set and 3GPP TS 27.007\/27.005.<\/p>\n<h4>Applications listed<\/h4>\n<ul>\n<li>Remote data monitoring and control<\/li>\n<li>Water, gas and oil metering<\/li>\n<li>Automatic meter reading (AMR)<\/li>\n<li>Power-plant monitoring and control<\/li>\n<li>Remote point-of-sale (POS) terminals<\/li>\n<li>Traffic-light monitoring and control<\/li>\n<li>Fleet management<\/li>\n<li>Power-distribution network supervision<\/li>\n<li>Central-heating system monitoring<\/li>\n<li>Weather-station data transmission<\/li>\n<li>Hydrological data acquisition<\/li>\n<li>Vending machines<\/li>\n<li>Traffic-information guidance<\/li>\n<li>Parking meters and taxi monitoring<\/li>\n<li>Telecom equipment supervision, including mobile base stations, microwave links and optical relay stations<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>SIM800A GSM\/GPRS modem board with serial interfaces, SIM holder and network-status LED. Check band support, power input and local 2G service before use.<\/p>\n","protected":false},"featured_media":58623,"template":"","meta":[],"product_brand":[],"product_cat":[314,316],"product_tag":[],"class_list":["post-58622","product","type-product","status-publish","has-post-thumbnail","product_cat-developpement-en","product_cat-modules-capteurs-en","first","instock","sale","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>SIM800A GSM\/GPRS Modem Board with RS232 | MicroPlanet<\/title>\n<meta name=\"description\" content=\"SIM800A GSM\/GPRS modem board for voice, SMS and GPRS data using AT commands. 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