This is an example based on mbed-os cellular APIs that demonstrates a TCP or UDP echo transaction with a public echo server. Especially, BG96 operation check based Mbed OS 5.11, tested via SK Telecom in Korea
This code could be access via Cat.M1(BG96 module) of SK telecom network in Korea. Need a WIZnet BG96 board and development board. Before using this code, must be checking your modem is authorized or not from SK telecom. This code is based on Mbed OS 5.11.5.
Tested with
- DISCOVERY_L485VG_IOT01A
- K66F
- K64F
1. Import the application into your desktop
mbed import https://os.mbed.com/users/Daniel_Lee/code/mbed-os-example-cellular-BG96_os511/ cd mbed-os-example-cellular-BG96_os511
2. Compile and program
mbed compile -t <toolchain> -m <TARGET_BOARD>
(supported toolchains : GCC_ARM / ARM / IAR)
3. Download binary to a target board
4. Result
mbed-os-example-cellular Built: Jun 4 2019, 13:45:53 [MAIN], plmn: (null) Modem power on Establishing connection .. Connection Established. TCP: connected with echo.mbedcloudtesting.com server TCP: Sent 4 Bytes to echo.mbedcloudtesting.com ...Received from echo server 4 Bytes ... Success. Exiting
5. Patched code
- Based on Mbed OS 5.11.5
- [Patch 1/2] https://github.com/DanielDmlee/mbed-os/commit/6c43e630bd81a47f6e949a36231812c878e237cf
- [Patch 2/2] https://github.com/DanielDmlee/mbed-os/commit/62d6a51c629f1b5d12695ce003227a5ac1324cd9
If need more information such as how to test, please look at https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-cellular/.
Diff: main.cpp
- Revision:
- 11:23ea0907186e
- Parent:
- 6:5678c0b6f74e
- Child:
- 13:4bea5334b419
--- a/main.cpp Wed Jun 06 07:45:26 2018 +0100 +++ b/main.cpp Mon Jun 18 09:00:19 2018 +0100 @@ -17,7 +17,6 @@ #include "mbed.h" #include "common_functions.h" #include "UDPSocket.h" -#include "OnboardCellularInterface.h" #include "CellularLog.h" #define UDP 0 @@ -41,16 +40,13 @@ // Number of retries / #define RETRY_COUNT 3 - - -// CellularInterface object -OnboardCellularInterface iface; +CellularBase *iface; // Echo server hostname -const char *host_name = "echo.mbedcloudtesting.com"; +const char *host_name = MBED_CONF_APP_ECHO_SERVER_HOSTNAME; // Echo server port (same for TCP and UDP) -const int port = 7; +const int port = MBED_CONF_APP_ECHO_SERVER_PORT; static rtos::Mutex trace_mutex; @@ -80,10 +76,16 @@ mbed_trace_mutex_wait_function_set(trace_wait); mbed_trace_mutex_release_function_set(trace_release); + + mbed_cellular_trace::mutex_wait_function_set(trace_wait); + mbed_cellular_trace::mutex_release_function_set(trace_release); } static void trace_close() { + mbed_cellular_trace::mutex_wait_function_set(NULL); + mbed_cellular_trace::mutex_release_function_set(NULL); + mbed_trace_free(); } #endif // #if MBED_CONF_MBED_TRACE_ENABLE @@ -104,7 +106,7 @@ { while (true) { Thread::wait(4000); - if (!iface.is_connected()) { + if (!iface->is_connected()) { trace_mutex.lock(); printf("."); fflush(stdout); @@ -123,8 +125,8 @@ nsapi_error_t retcode = NSAPI_ERROR_OK; uint8_t retry_counter = 0; - while (!iface.is_connected()) { - retcode = iface.connect(); + while (!iface->is_connected()) { + retcode = iface->connect(); if (retcode == NSAPI_ERROR_AUTH_FAILURE) { print_function("\n\nAuthentication Failure. Exiting application\n"); } else if (retcode == NSAPI_ERROR_OK) { @@ -154,14 +156,14 @@ UDPSocket sock; #endif - retcode = sock.open(&iface); + retcode = sock.open(iface); if (retcode != NSAPI_ERROR_OK) { print_function("UDPSocket.open() fails, code: %d\n", retcode); return -1; } SocketAddress sock_addr; - retcode = iface.gethostbyname(host_name, &sock_addr); + retcode = iface->gethostbyname(host_name, &sock_addr); if (retcode != NSAPI_ERROR_OK) { print_function("Couldn't resolve remote host: %s, code: %d\n", host_name, retcode); return -1; @@ -222,14 +224,14 @@ #else dot_thread.start(dot_event); #endif // #if MBED_CONF_MBED_TRACE_ENABLE + iface = CellularBase::get_default_instance(); + MBED_ASSERT(iface); + /* Set Pin code for SIM card */ - iface.set_sim_pin(MBED_CONF_APP_SIM_PIN_CODE); + iface->set_sim_pin(MBED_CONF_APP_SIM_PIN_CODE); /* Set network credentials here, e.g., APN */ - iface.set_credentials(MBED_CONF_APP_APN, MBED_CONF_APP_USERNAME, MBED_CONF_APP_PASSWORD); - - /* Set the modem debug on/off */ - iface.modem_debug_on(MBED_CONF_APP_MODEM_TRACE); + iface->set_credentials(MBED_CONF_APP_APN, MBED_CONF_APP_USERNAME, MBED_CONF_APP_PASSWORD); nsapi_error_t retcode = NSAPI_ERROR_NO_CONNECTION;