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/.
main.cpp
- Committer:
- Daniel_Lee
- Date:
- 2019-07-24
- Revision:
- 44:e621506d052d
- Parent:
- 43:91f11760b50f
File content as of revision 44:e621506d052d:
/* * Copyright (c) 2017 ARM Limited. All rights reserved. * SPDX-License-Identifier: Apache-2.0 * Licensed under the Apache License, Version 2.0 (the License); you may * not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an AS IS BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "mbed.h" #include "common_functions.h" #include "UDPSocket.h" #include "CellularLog.h" #define UDP 0 #define TCP 1 // Number of retries / #define RETRY_COUNT 3 void BG96_Modem_PowerON(void) { DigitalOut BG96_RESET(D7); DigitalOut BG96_PWRKEY(D9); BG96_RESET = 1; BG96_PWRKEY = 1; wait_ms(200); BG96_RESET = 0; BG96_PWRKEY = 0; wait_ms(300); BG96_RESET = 1; wait_ms(5000); } NetworkInterface *iface; // Echo server hostname const char *host_name = MBED_CONF_APP_ECHO_SERVER_HOSTNAME; // Echo server port (same for TCP and UDP) const int port = MBED_CONF_APP_ECHO_SERVER_PORT; 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); 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 Thread dot_thread(osPriorityNormal, 512); void print_function(const char *format, ...) { trace_mutex.lock(); va_list arglist; va_start( arglist, format ); vprintf(format, arglist); va_end( arglist ); trace_mutex.unlock(); } void dot_event() { while (true) { ThisThread::sleep_for(4000); if (iface && iface->get_connection_status() == NSAPI_STATUS_GLOBAL_UP) { break; } else { trace_mutex.lock(); printf("."); fflush(stdout); trace_mutex.unlock(); } } } /** * Connects to the Cellular Network */ nsapi_error_t do_connect() { nsapi_error_t retcode = NSAPI_ERROR_OK; uint8_t retry_counter = 0; while (iface->get_connection_status() != NSAPI_STATUS_GLOBAL_UP) { retcode = iface->connect(); if (retcode == NSAPI_ERROR_AUTH_FAILURE) { print_function("\n\nAuthentication Failure. Exiting application\n"); } 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; } break; } return retcode; } /** * Opens a UDP or a TCP socket with the given echo server and performs an echo * transaction retrieving current. */ nsapi_error_t test_send_recv() { nsapi_size_or_error_t retcode; #if MBED_CONF_APP_SOCK_TYPE == TCP TCPSocket sock; #else UDPSocket sock; #endif retcode = sock.open(iface); if (retcode != NSAPI_ERROR_OK) { #if MBED_CONF_APP_SOCK_TYPE == TCP print_function("TCPSocket.open() fails, code: %d\n", retcode); #else print_function("UDPSocket.open() fails, code: %d\n", retcode); #endif return -1; } SocketAddress 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; } sock_addr.set_port(port); sock.set_timeout(15000); int n = 0; const char *echo_string = "TEST"; char recv_buf[4]; #if MBED_CONF_APP_SOCK_TYPE == TCP retcode = sock.connect(sock_addr); if (retcode < 0) { print_function("TCPSocket.connect() fails, code: %d\n", retcode); return -1; } else { print_function("TCP: connected with %s server\n", host_name); } retcode = sock.send((void*) echo_string, sizeof(echo_string)); if (retcode < 0) { print_function("TCPSocket.send() fails, code: %d\n", retcode); return -1; } else { print_function("TCP: Sent %d Bytes to %s\n", retcode, host_name); } n = sock.recv((void*) recv_buf, sizeof(recv_buf)); #else retcode = sock.sendto(sock_addr, (void*) echo_string, sizeof(echo_string)); if (retcode < 0) { print_function("UDPSocket.sendto() fails, code: %d\n", retcode); return -1; } else { print_function("UDP: Sent %d Bytes to %s\n", retcode, host_name); } n = sock.recvfrom(&sock_addr, (void*) recv_buf, sizeof(recv_buf)); #endif sock.close(); if (n > 0) { print_function("Received from echo server %d Bytes\n", n); return 0; } return -1; } int main() { print_function("\n\nmbed-os-example-cellular\n"); print_function("\n\nBuilt: %s, %s\n", __DATE__, __TIME__); #ifdef MBED_CONF_NSAPI_DEFAULT_CELLULAR_PLMN print_function("\n\n[MAIN], plmn: %s\n", (MBED_CONF_NSAPI_DEFAULT_CELLULAR_PLMN ? MBED_CONF_NSAPI_DEFAULT_CELLULAR_PLMN : "NULL")); #endif print_function("Establishing connection\n"); BG96_Modem_PowerON(); print_function("M2Mnet(BG96) Power ON\n"); #if MBED_CONF_MBED_TRACE_ENABLE trace_open(); #else dot_thread.start(dot_event); #endif // #if MBED_CONF_MBED_TRACE_ENABLE // sim pin, apn, credentials and possible plmn are taken atuomtically from json when using get_default_instance() iface = NetworkInterface::get_default_instance(); MBED_ASSERT(iface); nsapi_error_t retcode = NSAPI_ERROR_NO_CONNECTION; /* Attempt to connect to a cellular network */ if (do_connect() == NSAPI_ERROR_OK) { retcode = test_send_recv(); } if (iface->disconnect() != NSAPI_ERROR_OK) { print_function("\n\n disconnect failed.\n\n"); } 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(); #else dot_thread.terminate(); #endif // #if MBED_CONF_MBED_TRACE_ENABLE return 0; } // EOF