<!--
---
title: "SIMCom SIM808 and SIM868"
description: "Manufacturer: SIMCom. Models: SIM808, SIM868."
id: "group__simcom__sim808"
kind: "group"
project: "TinyGSM"
version: "0.13.0"
generated_at: "2026-10-27"
---
-->

# SIMCom SIM808 and SIM868 (group)

**Module:** **[Supported Modules](group__group__supported__modules.html)** **/** **[SIMCom](group__group__simcom.html)** **/** **[SIMCom SIM800, SIM900 and variants](group__simcom__sim800.html)** **/** **[SIMCom SIM808 and SIM868](group__simcom__sim808.html)**
Manufacturer: SIMCom. Models: SIM808, SIM868.

## Connection Information

- TCP sockets: 8.
- SSL sockets: 5.
- Socket Buffering:
  - The modem has an internal buffer for incoming data.
- Socket Numbering:
  - The modem respects user-specified multiplexing channel numbers/identifiers for socket connections.
- Note: This module inherits TCP/SSL behavior from [TinyGsmClientSIM800.h](_tiny_gsm_client_s_i_m800_8h.md).

## Supported Public Functions

- [TinyGsmSim808](class_tiny_gsm_sim808.md)
  - GSM Modem Constructor
    - [TinyGsmSim808(Stream& stream)](class_tiny_gsm_sim808.md#a6f01148a6167d2b56dfcb0e0c0c4e029)
  - Basic functions ([TinyGsmModem.tpp](_tiny_gsm_modem_8tpp.md))
    - [begin(const char* pin=nullptr)](class_tiny_gsm_modem.md#ae4397a65939a770e478e29c718d13e59)
    - [init(const char* pin=nullptr)](class_tiny_gsm_modem.md#a27f7f71fb1a2008dc57f6d454564022c)
    - [sendAT(Args... cmd)](class_tiny_gsm_modem.md#afa190e606feb7831c86094577064d2e6)
    - [setBaud(uint32_t baud)](class_tiny_gsm_modem.md#a279bffb4e905f1150dadab726e8482f2)
    - [forceModemBaud(StreamObject& at_serial, uint32_t targetBaud)](class_tiny_gsm_modem.md#a0ff68001b77fed375db7e048bc5ab5f4)
    - [testAT(uint32_t timeout_ms=10000L)](class_tiny_gsm_modem.md#a5bfedec6b19edfbcbc0a5832fff7d603)
    - [waitResponse(uint32_t timeout_ms, String& data, GsmConstStr r1=GFP(ModemConfig::GSM_OK), GsmConstStr r2=GFP(ModemConfig::GSM_ERROR), GsmConstStr r3=nullptr, GsmConstStr r4=nullptr, GsmConstStr r5=nullptr, GsmConstStr r6=nullptr, GsmConstStr r7=nullptr, GsmConstStr r8=nullptr)](class_tiny_gsm_modem.md#a4416426fc61492fcb761139b85f1535b)
    - [waitResponse(uint32_t timeout_ms, GsmConstStr r1=GFP(ModemConfig::GSM_OK), GsmConstStr r2=GFP(ModemConfig::GSM_ERROR), GsmConstStr r3=nullptr, GsmConstStr r4=nullptr, GsmConstStr r5=nullptr, GsmConstStr r6=nullptr, GsmConstStr r7=nullptr, GsmConstStr r8=nullptr)](class_tiny_gsm_modem.md#a5d04ca30762417cd04f0df3b620b6df7)
    - [waitResponse(GsmConstStr r1=GFP(ModemConfig::GSM_OK), GsmConstStr r2=GFP(ModemConfig::GSM_ERROR), GsmConstStr r3=nullptr, GsmConstStr r4=nullptr, GsmConstStr r5=nullptr, GsmConstStr r6=nullptr, GsmConstStr r7=nullptr, GsmConstStr r8=nullptr)](class_tiny_gsm_modem.md#ac8849ac15a91800244750682561c3938)
    - [getConfiguredModem()](class_tiny_gsm_modem.md#a2f9a76aa8ef51867e560196a8261c170)
    - [getModemInfo()](class_tiny_gsm_modem.md#a587c942eefa8b4905da4cfaf79d04c53)
    - [getModemName()](class_tiny_gsm_modem.md#a500246b8d736f654ffd91db17664e42a)
    - [getModemManufacturer()](class_tiny_gsm_modem.md#a3bf0eb3d18cefc70a0277103719873aa)
    - [getModemModel()](class_tiny_gsm_modem.md#ae0ca787c0bb16776f3b326a899c39d4e)
    - [getModemRevision()](class_tiny_gsm_modem.md#a748dce8b32f1a5d4ca0f9bf9a5ea55a2)
    - [getModemSerialNumber()](class_tiny_gsm_modem.md#a3a13f308ec6beb7e2a270d1ece67978e)
    - [factoryDefault()](class_tiny_gsm_modem.md#a229a18e6a1226a51301ba3a41f75947d)
  - Power functions ([TinyGsmModem.tpp](_tiny_gsm_modem_8tpp.md))
    - [restart(const char* pin=nullptr)](class_tiny_gsm_modem.md#a986567555e19bc82fc3f4f154f89de40)
    - [powerOff()](class_tiny_gsm_modem.md#ac6d0ce36377992e00b0d38c5cb1a9126)
    - [radioOff()](class_tiny_gsm_modem.md#a084efec47f33f71933c2084bf4c3fead)
    - [sleepEnable(bool enable=true)](class_tiny_gsm_modem.md#ae293a3c9ef0c55ce7dbc05a29dd5c3a7)
    - [setPhoneFunctionality(uint8_t fun, bool reset=false)](class_tiny_gsm_modem.md#a496f2e6fb026bea432f2f3d31b50d2be)
  - Generic network functions ([TinyGsmModem.tpp](_tiny_gsm_modem_8tpp.md))
    - [getRegistrationStatus()](class_tiny_gsm_modem.md#a75286fdda3bb1672f1c88a06d010c04d)
    - [isNetworkConnected()](class_tiny_gsm_modem.md#ac6923f6667d67ec47e88a15d34d365fe)
    - [waitForNetwork(uint32_t timeout_ms=60000L, bool check_signal=false)](class_tiny_gsm_modem.md#a8cdad3a71c520124dd1d5aed16ee726b)
    - [getSignalQuality()](class_tiny_gsm_modem.md#a714c21a155a823bb32a7be87fde815bd)
    - [getLocalIP()](class_tiny_gsm_modem.md#a69cbe284005cf8831b0155f5ba721d87)
    - [localIP()](class_tiny_gsm_modem.md#ab6aae9d6513ea9496f79704367eeff44)
  - SIM card functions ([TinyGsmCellularData.tpp](_tiny_gsm_cellular_data_8tpp.md))
    - [simUnlock(const char* pin)](class_tiny_gsm_cellular_data.md#a46b40b70163ca37dd1883f6e1bec7272)
    - [getSimCCID()](class_tiny_gsm_cellular_data.md#a2394167c2b2c642ace167c119c3deeb4)
    - [getIMEI()](class_tiny_gsm_cellular_data.md#a3f0b243a229a2aff6734338079d2e4e0)
    - [getIMSI()](class_tiny_gsm_cellular_data.md#a347b32fc42b5e83a9de8c1aed89f2b8f)
    - [getSimStatus(uint32_t timeout_ms=10000L)](class_tiny_gsm_cellular_data.md#aa8dce718093a53a8be05dd75958f721b)
  - Cellular data functions ([TinyGsmCellularData.tpp](_tiny_gsm_cellular_data_8tpp.md))
    - [dataConnect(const char* apn, const char* user=nullptr, const char* pwd=nullptr)](class_tiny_gsm_cellular_data.md#a3f5c815c342ec843815275714f49ea38)
    - [dataDisconnect()](class_tiny_gsm_cellular_data.md#a9cd2d7200cca08f6c77c5d0d7ad23297)
    - [isDataConnected()](class_tiny_gsm_cellular_data.md#a1986a60dd0359e7f7fcc00714bb7b596)
    - [gprsConnect(const char* apn, const char* user=nullptr, const char* pwd=nullptr)](class_tiny_gsm_cellular_data.md#a5e70cb2c0089d90785b4fbacad7d9cc6)
    - [gprsDisconnect()](class_tiny_gsm_cellular_data.md#a9d9449ead109f7cd29c1f1a51b05262c)
    - [isGprsConnected()](class_tiny_gsm_cellular_data.md#a5320772696eee50a92607c08aeffe4f5)
    - [getOperator()](class_tiny_gsm_cellular_data.md#a9f2024e87d6ee10f9ba63ba2d3803d83)
    - [getProvider()](class_tiny_gsm_cellular_data.md#a24b68e67990b72c3f27e2878ef4c6c36)
  - Socket listening functions ([TinyGsmTCP.tpp](_tiny_gsm_t_c_p_8tpp.md))
    - [maintain()](class_tiny_gsm_t_c_p.md#a35e2f8d26fd77dd0c217631b153d41bc)
  - Phone call functions ([TinyGsmCalling.tpp](_tiny_gsm_calling_8tpp.md))
    - [callAnswer()](class_tiny_gsm_calling.md#a6b4a239a88045684c75450ba1fed7357)
    - [callNumber(const String& number)](class_tiny_gsm_calling.md#ac37617522cec7757a026ff4afde827e2)
    - [callHangup()](class_tiny_gsm_calling.md#ad526aeba6fa6c5cadfc62bf0be261cb7)
    - [dtmfSend(char cmd, int duration_ms=100)](class_tiny_gsm_calling.md#a8bcc2a98729f0c4fe2b4a67d1a1e3cfc)
  - Phone call functions
    - [setGsmBusy(bool busy=true)](class_tiny_gsm_sim800.md#ab50fcc1cb5e17a67b05c379bce14ed8f)
  - Audio functions
    - [setVolume(uint8_t volume=50)](class_tiny_gsm_sim800.md#af90e2d9affce2b1e45fbee44083f5d7f)
    - [getVolume()](class_tiny_gsm_sim800.md#a7eb9b9d8a54d51b01468fdc752a2c703)
    - [setMicVolume(uint8_t channel, uint8_t level)](class_tiny_gsm_sim800.md#af9ee2a26211513e6b6d7892da09438f1)
    - [setAudioChannel(uint8_t channel)](class_tiny_gsm_sim800.md#a2daf484d10571169f2d586caf350dbf9)
    - [playToolkitTone(uint8_t tone, uint32_t duration)](class_tiny_gsm_sim800.md#a14786546fcbd388593e2ba8f77880cbb)
  - Text messaging (SMS) functions ([TinyGsmSMS.tpp](_tiny_gsm_s_m_s_8tpp.md))
    - [sendUSSD(const String& code)](class_tiny_gsm_s_m_s.md#a0d0e6c715e06650381620ec1417edcfd)
    - [sendSMS(const String& number, const String& text)](class_tiny_gsm_s_m_s.md#afbbd31f4c58b16319bef3e3b9e42b5dd)
    - [sendSMS_UTF16(const char* const number, const void* text, size_t len)](class_tiny_gsm_s_m_s.md#a430127e129d6fb41b643a0364deca94b)
  - GSM location functions ([TinyGsmGSMLocation.tpp](_tiny_gsm_g_s_m_location_8tpp.md))
    - [getGsmLocationRaw()](class_tiny_gsm_g_s_m_location.md#af00b039ec514996fda8e509f84c48066)
    - [getGsmLocation()](class_tiny_gsm_g_s_m_location.md#a58c3f3447ffd2b0971193c01cd3b249c)
    - [getGsmLocation(float* lat, float* lon, float* accuracy=0, int* year=0, int* month=0, int* day=0, int* hour=0, int* minute=0, int* second=0)](class_tiny_gsm_g_s_m_location.md#afbf9f143d98c93d4c19e18655ce51d6d)
    - [getGsmLocationTime(int* year, int* month, int* day, int* hour, int* minute, int* second)](class_tiny_gsm_g_s_m_location.md#ad75df6e99b6198fa36a881747526b86b)
  - GPS (GNSS, GLONASS) functions ([TinyGsmGPS.tpp](_tiny_gsm_g_p_s_8tpp.md))
    - [enableGPS()](class_tiny_gsm_g_p_s.md#a2e2ba379f9703e75cd9fcccbaa612b14)
    - [disableGPS()](class_tiny_gsm_g_p_s.md#a0a241f7bc6888f1f3029bf05a3eb7447)
    - [getGPSraw()](class_tiny_gsm_g_p_s.md#a72ee31b48c9c88b9e58e0990a49fc070)
    - [getGPS(float* lat, float* lon, float* speed=0, float* alt=0, int* vsat=0, int* usat=0, float* accuracy=0, int* year=0, int* month=0, int* day=0, int* hour=0, int* minute=0, int* second=0)](class_tiny_gsm_g_p_s.md#a74e228fb9ee58595c6d009a1cc1ed299)
    - [getGPSTime(int* year, int* month, int* day, int* hour, int* minute, int* second)](class_tiny_gsm_g_p_s.md#a80b8c15b45600f4ea898ed3a6050c0d4)
  - NTP server functions ([TinyGsmNTP.tpp](_tiny_gsm_n_t_p_8tpp.md))
    - [NTPServerSync(const char* server=](class_tiny_gsm_n_t_p.md#a72a863af36cd16f7f0211b1f1f5105e8)pool.ntp.org&quot;, int TimeZone=0)&quot;
    - [NTPServerSync(const String& server, int TimeZone=0)](class_tiny_gsm_n_t_p.md#a8a9738236ba9b847613a48bac8c88bc4)
    - [waitForTimeSync(uint16_t timeout_s=120)](class_tiny_gsm_n_t_p.md#a50d239cdcd408a6448ab1e5e1b24504a)
  - Time functions ([TinyGsmTime.tpp](_tiny_gsm_time_8tpp.md))
    - [getGSMDateTime(TinyGSMDateTimeFormat format)](class_tiny_gsm_time.md#adaaa4aba622ee5d874fcc2abc6109e84)
    - [getNetworkTime(int* year, int* month, int* day, int* hour, int* minute, int* second, float* timezone)](class_tiny_gsm_time.md#a68d9baf6ba1f006441b3d71e5e058cdb)
    - [getNetworkEpoch(TinyGSM_EpochStart epoch=TinyGSM_EpochStart::UNIX)](class_tiny_gsm_time.md#a96cf8b52cd88938c4211d17de826376e)
  - Battery functions ([TinyGsmBattery.tpp](_tiny_gsm_battery_8tpp.md))
    - [getBattVoltage()](class_tiny_gsm_battery.md#af41311b4c55dea716a0ef6afd14846ac)
    - [getBattPercent()](class_tiny_gsm_battery.md#a349ded65e22bc04beb5dd320b58965d6)
    - [getBattChargeState()](class_tiny_gsm_battery.md#ac2179871063de50df9e3134a049f68b0)
    - [getBattStats(int8_t& chargeState, int8_t& percent, int16_t& milliVolts)](class_tiny_gsm_battery.md#a0aeea9308d460dcd811089c5821eada3)
  - Bluetooth functions ([TinyGsmBluetooth.tpp](_tiny_gsm_bluetooth_8tpp.md))
    - [enableBluetooth()](class_tiny_gsm_bluetooth.md#a495ebed12f0fd5cda6c42190ee61d815)
    - [disableBluetooth()](class_tiny_gsm_bluetooth.md#add9a2820b23a6170fbf4e6e42b85f4b7)
    - [setBluetoothVisibility(bool visible)](class_tiny_gsm_bluetooth.md#a38291783d84cf0f8eee11d07d147fd79)
    - [setBluetoothHostName(const char* name)](class_tiny_gsm_bluetooth.md#a0be1bed0865059ee233c7aba5ea5073f)
  - Utilities ([TinyGsmModem.tpp](_tiny_gsm_modem_8tpp.md))
    - [streamPrint(T last)](class_tiny_gsm_modem.md#a03866a35c711956553c8acf7fd84aed4)
    - [streamPrint(T head, Args... tail)](class_tiny_gsm_modem.md#a571ab0adb68e9ccf086d93d13f8fa9f3)
    - [streamWrite(const char* data, uint16_t len)](class_tiny_gsm_modem.md#a2c3e4abbc6c1b8550bb216bc05dbc1e5)
    - [streamWrite(GsmConstStr data, uint16_t len)](class_tiny_gsm_modem.md#a2c3e4abbc6c1b8550bb216bc05dbc1e5)
    - [streamClear()](class_tiny_gsm_modem.md#a7879aad8a0f9def7cd8d7450800b2d64)
    - [streamDump(int16_t expected_len)](class_tiny_gsm_modem.md#a20ccc061bab4e038a8800c244e761ecd)

## Classes

| | Name |
| --- | --- |
| class | **TinyGsmSim808** |

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