Test code that Cat.M1 of BG96 for SK Telecom in Korea
This example showing how to use Cat.M1(BG96 module) of SK telecom network in Korea. You need a WIZnet BG96 board or can connect directly to M2Mnet BG96 module and development board.
Or
- BG96 RESET = D7
- BG96 PWRKEY = D9
- BG96 RX = D0(or D2)
- BG96 TX = D1(or D8)
- BG96 VCC = VCC(5V)
- BG96 GND = GND
Tested with
- NUCLEO_F429ZI
- DISCO_L475VG_IOT01A
- K66F
- K64F
Below boards are Need to connect board's D2 and D8 to BG96's TX and RX on mbed_app.json
- NUCLEO_L152RE
- NUCLEO_F401RE
"QUECTEL_BG96.tx": "D8", "QUECTEL_BG96.rx": "D2",
1. Import the application into your desktop:
mbed import https://os.mbed.com/users/Daniel_Lee/code/mbed-os-example-cellular-BG96/ cd mbed-os-example-cellular-BG96
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: Jul 24 2019, 14:55:22 [MAIN], plmn: NULL Establishing connection M2Mnet(BG96) Power ON [00005501ms][INFO][CELL]: New CellularContext (20004120) [00005501ms][INFO][CELL]: CellularContext plmn NULL [00005502ms][INFO][CELL]: CellularContext connect [00006503ms][INFO][CELL]: Start connecting (timeout 1000 ms) [00006512ms][INFO][CELL]: RSSI unknown [00006520ms][INFO][CELL]: Modem ready [00006524ms][INFO][CELL]: RSSI unknown [00006524ms][INFO][CELL]: Setup SIM (timeout 1000 ms) [00006529ms][INFO][CELL]: SIM is ready [00006558ms][INFO][CELL]: RSSI unknown [00006566ms][INFO][CELL]: Network registration (timeout 1000 ms) [00006570ms][INFO][CELL]: Continue after 1 seconds [00006964ms][ERR ][CELL]: AT overflow [00007576ms][INFO][CELL]: RSSI unknown [00007582ms][INFO][CELL]: Registering network => Attaching network [00007586ms][INFO][CELL]: RSSI unknown [00007586ms][INFO][CELL]: Attaching network (timeout 1000 ms) [00007660ms][INFO][CELL]: Found PDP context 7 [00007663ms][INFO][CELL]: Activate PDP context 7 [00009733ms][INFO][CELL]: Found PDP context 7 Connection Established. [00009742ms][INFO][CELL]: Socket 0 open [00009752ms][INFO][CELL]: Socket 1 open [00009786ms][INFO][CELL]: Socket 1 sent 43 bytes to 8.8.8.8 port 53 [00009967ms][INFO][CELL]: Socket 1 recv 71 bytes from 64:ff9b::808:808 port 53 [00009972ms][INFO][CELL]: Socket 1 closed TCP: connected with echo.mbedcloudtesting.com server [00010384ms][INFO][CELL]: Socket 0 sent 4 bytes to 2a05:d018:21f:3800:3164:2a5c7 TCP: Sent 4 Bytes to echo.mbedcloudtesting.com [00011257ms][INFO][CELL]: Socket 0 recv 4 bytes [00021263ms][INFO][CELL]: Socket 0 closed Received from echo server 4 Bytes [00021263ms][INFO][CELL]: CellularContext disconnect() [00021264ms][INFO][CELL]: cb: CellularContext disconnected Success. Exiting
5. Patched code
- Base modified location : mbed-os/features/cellular/framework/targets/QUECTEL/BG96
- https://github.com/DanielDmlee/mbed-os/commit/820e0a323641a88fdf5981e0d51219a3104c5ea0
- https://github.com/DanielDmlee/mbed-os/commit/26c3bcf75988eac1ad0b1ca347726da0ad636b64
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:
- 6:5678c0b6f74e
- Parent:
- 2:0f644d6045cf
- Child:
- 11:23ea0907186e
--- a/main.cpp Wed Apr 11 06:30:27 2018 +0100 +++ b/main.cpp Thu May 10 05:17:02 2018 +0100 @@ -18,6 +18,7 @@ #include "common_functions.h" #include "UDPSocket.h" #include "OnboardCellularInterface.h" +#include "CellularLog.h" #define UDP 0 #define TCP 1 @@ -51,65 +52,93 @@ // Echo server port (same for TCP and UDP) const int port = 7; -Mutex PrintMutex; +static rtos::Mutex trace_mutex; + +#if MBED_CONF_MBED_TRACE_ENABLE +static void trace_wait() +{ + trace_mutex.lock(); +} + +static void trace_release() +{ + trace_mutex.unlock(); +} + +static char time_st[50]; + +static char* trace_time(size_t ss) +{ + snprintf(time_st, 49, "[%08llums]", Kernel::get_ms_count()); + return time_st; +} + +static void trace_open() +{ + mbed_trace_init(); + mbed_trace_prefix_function_set( &trace_time ); + + mbed_trace_mutex_wait_function_set(trace_wait); + mbed_trace_mutex_release_function_set(trace_release); +} + +static void trace_close() +{ + mbed_trace_free(); +} +#endif // #if MBED_CONF_MBED_TRACE_ENABLE + Thread dot_thread(osPriorityNormal, 512); -#define PRINT_TEXT_LENGTH 128 -char print_text[PRINT_TEXT_LENGTH]; -void print_function(const char *input_string) +void print_function(const char *format, ...) { - PrintMutex.lock(); - printf("%s", input_string); - fflush(NULL); - PrintMutex.unlock(); + trace_mutex.lock(); + va_list arglist; + va_start( arglist, format ); + vprintf(format, arglist); + va_end( arglist ); + trace_mutex.unlock(); } void dot_event() { - while (true) { - wait(4); + Thread::wait(4000); if (!iface.is_connected()) { - print_function("."); + trace_mutex.lock(); + printf("."); + fflush(stdout); + trace_mutex.unlock(); } else { break; } } - } - /** * Connects to the Cellular Network */ nsapi_error_t do_connect() { - nsapi_error_t retcode; + nsapi_error_t retcode = NSAPI_ERROR_OK; uint8_t retry_counter = 0; while (!iface.is_connected()) { - retcode = iface.connect(); if (retcode == NSAPI_ERROR_AUTH_FAILURE) { print_function("\n\nAuthentication Failure. Exiting application\n"); - return retcode; - } else if (retcode != NSAPI_ERROR_OK) { - snprintf(print_text, PRINT_TEXT_LENGTH, "\n\nCouldn't connect: %d, will retry\n", retcode); - print_function(print_text); + } else if (retcode == NSAPI_ERROR_OK) { + print_function("\n\nConnection Established.\n"); + } else if (retry_counter > RETRY_COUNT) { + print_function("\n\nFatal connection failure: %d\n", retcode); + } else { + print_function("\n\nCouldn't connect: %d, will retry\n", retcode); retry_counter++; continue; - } else if (retcode != NSAPI_ERROR_OK && retry_counter > RETRY_COUNT) { - snprintf(print_text, PRINT_TEXT_LENGTH, "\n\nFatal connection failure: %d\n", retcode); - print_function(print_text); - return retcode; } - break; } - - print_function("\n\nConnection Established.\n"); - - return NSAPI_ERROR_OK; + return retcode; } /** @@ -127,17 +156,14 @@ retcode = sock.open(&iface); if (retcode != NSAPI_ERROR_OK) { - snprintf(print_text, PRINT_TEXT_LENGTH, "UDPSocket.open() fails, code: %d\n", retcode); - print_function(print_text); + print_function("UDPSocket.open() fails, code: %d\n", retcode); return -1; } SocketAddress sock_addr; retcode = iface.gethostbyname(host_name, &sock_addr); if (retcode != NSAPI_ERROR_OK) { - snprintf(print_text, PRINT_TEXT_LENGTH, "Couldn't resolve remote host: %s, code: %d\n", host_name, - retcode); - print_function(print_text); + print_function("Couldn't resolve remote host: %s, code: %d\n", host_name, retcode); return -1; } @@ -150,21 +176,17 @@ #if MBED_CONF_APP_SOCK_TYPE == TCP retcode = sock.connect(sock_addr); if (retcode < 0) { - snprintf(print_text, PRINT_TEXT_LENGTH, "TCPSocket.connect() fails, code: %d\n", retcode); - print_function(print_text); + print_function("TCPSocket.connect() fails, code: %d\n", retcode); return -1; } else { - snprintf(print_text, PRINT_TEXT_LENGTH, "TCP: connected with %s server\n", host_name); - print_function(print_text); + print_function("TCP: connected with %s server\n", host_name); } retcode = sock.send((void*) echo_string, sizeof(echo_string)); if (retcode < 0) { - snprintf(print_text, PRINT_TEXT_LENGTH, "TCPSocket.send() fails, code: %d\n", retcode); - print_function(print_text); + print_function("TCPSocket.send() fails, code: %d\n", retcode); return -1; } else { - snprintf(print_text, PRINT_TEXT_LENGTH, "TCP: Sent %d Bytes to %s\n", retcode, host_name); - print_function(print_text); + print_function("TCP: Sent %d Bytes to %s\n", retcode, host_name); } n = sock.recv((void*) recv_buf, sizeof(recv_buf)); @@ -172,12 +194,10 @@ retcode = sock.sendto(sock_addr, (void*) echo_string, sizeof(echo_string)); if (retcode < 0) { - snprintf(print_text, PRINT_TEXT_LENGTH, "UDPSocket.sendto() fails, code: %d\n", retcode); - print_function(print_text); + print_function("UDPSocket.sendto() fails, code: %d\n", retcode); return -1; } else { - snprintf(print_text, PRINT_TEXT_LENGTH, "UDP: Sent %d Bytes to %s\n", retcode, host_name); - print_function(print_text); + print_function("UDP: Sent %d Bytes to %s\n", retcode, host_name); } n = sock.recvfrom(&sock_addr, (void*) recv_buf, sizeof(recv_buf)); @@ -186,8 +206,7 @@ sock.close(); if (n > 0) { - snprintf(print_text, PRINT_TEXT_LENGTH, "Received from echo server %d Bytes\n", n); - print_function(print_text); + print_function("Received from echo server %d Bytes\n", n); return 0; } @@ -196,28 +215,38 @@ int main() { - - iface.modem_debug_on(MBED_CONF_APP_MODEM_TRACE); + print_function("\n\nmbed-os-example-cellular\n"); + print_function("Establishing connection\n"); +#if MBED_CONF_MBED_TRACE_ENABLE + trace_open(); +#else + dot_thread.start(dot_event); +#endif // #if MBED_CONF_MBED_TRACE_ENABLE /* Set Pin code for SIM card */ iface.set_sim_pin(MBED_CONF_APP_SIM_PIN_CODE); - /* Set network credentials here, e.g., APN*/ + /* Set network credentials here, e.g., APN */ iface.set_credentials(MBED_CONF_APP_APN, MBED_CONF_APP_USERNAME, MBED_CONF_APP_PASSWORD); - print_function("\n\nmbed-os-example-cellular\n"); - print_function("Establishing connection "); - dot_thread.start(dot_event); + /* Set the modem debug on/off */ + iface.modem_debug_on(MBED_CONF_APP_MODEM_TRACE); + + nsapi_error_t retcode = NSAPI_ERROR_NO_CONNECTION; /* Attempt to connect to a cellular network */ if (do_connect() == NSAPI_ERROR_OK) { - nsapi_error_t retcode = test_send_recv(); - if (retcode == NSAPI_ERROR_OK) { - print_function("\n\nSuccess. Exiting \n\n"); - return 0; - } + retcode = test_send_recv(); } - print_function("\n\nFailure. Exiting \n\n"); - return -1; + if (retcode == NSAPI_ERROR_OK) { + print_function("\n\nSuccess. Exiting \n\n"); + } else { + print_function("\n\nFailure. Exiting \n\n"); + } +#if MBED_CONF_MBED_TRACE_ENABLE + trace_close(); +#endif // #if MBED_CONF_MBED_TRACE_ENABLE + + return 0; } // EOF