Cellular example code for Seeed Wio 3G and Wio LTE-M1/NB1(BG96)

Example cellular application for Mbed OS

This is an example based on `mbed-os` cellular APIs that demonstrates a TCP or UDP echo transaction with a public echo server.

(Note: To see this example in a rendered form you can import into the Arm Mbed Online Compiler, please see the documentation.)

Getting started

This particular cellular application uses a cellular network and network-socket APIs that are part of `mbed-os`.

The program uses a cellular modem driver using an external IP stack (LWIP) standard 3GPP AT 27.007 AT commands to setup the cellular modem and registers to the network.

After registration, the driver opens a point-to-point protocol (PPP) pipe using LWIP with the cellular modem and connects to internet. This driver currently supports UART data connection type only between your cellular modem and MCU.

For more information on Arm Mbed OS cellular APIs and porting guide, please visit the Mbed OS cellular API and contributing documentation.

Download the application

$ mbed import mbed-os-example-cellular
$ cd mbed-os-example-cellular
 
#OR
 
$ git clone git@github.com:ARMmbed/mbed-os-example-cellular.git
$ cd mbed-os-example-cellular

Change the network and SIM credentials

See the file `mbed_app.json` in the root directory of your application. This file contains all the user specific configurations your application needs. Provide the pin code for your SIM card, as well as any APN settings if needed. For example:

        "nsapi.default-cellular-plmn": 0,
        "nsapi.default-cellular-sim-pin": "\"1234\"",
        "nsapi.default-cellular-apn": 0,
        "nsapi.default-cellular-username": 0,
        "nsapi.default-cellular-password": 0

Selecting socket type (TCP, UDP or NONIP)

You can choose which socket type the application should use; however, please note that TCP is a more reliable transmission protocol. For example:

 
     "sock-type": "TCP",
 

Turning modem AT echo trace on

If you like details and wish to know about all the AT interactions between the modem and your driver, turn on the modem AT echo trace.

        "cellular.debug-at": true

Turning on the tracing and trace level

If you like to add more traces or follow the current ones you can turn traces on by changing `mbed-trace.enable` in mbed_app.json

"target_overrides": {
        "*": {
            "mbed-trace.enable": true,

After you have defined `mbed-trace.enable: true`, you can set trace levels by changing value in `trace-level`

"trace-level": {
            "help": "Options are TRACE_LEVEL_ERROR,TRACE_LEVEL_WARN,TRACE_LEVEL_INFO,TRACE_LEVEL_DEBUG",
            "macro_name": "MBED_TRACE_MAX_LEVEL",
            "value": "TRACE_LEVEL_INFO"
        }

Board support

The cellular modem driver in this example uses PPP with an Mbed-supported external IP stack. It supports targets when modem exists on the Mbed Enabled target as opposed to plug-in modules (shields). For more details, please see our Mbed OS cellular documentation.

Compiling the application

The master branch is for daily development and it uses the latest mbed-os/master release.

To use older versions update Mbed OS release tag, for example:

mbed releases
 * mbed-os-5.10.4
   ...
mbed update mbed-os-5.10.4

You may need to use `clean` option to discard your local changes (use with caution).

Use Mbed CLI commands to generate a binary for the application. For example, in the case of GCC, use the following command:

$ mbed compile -m YOUR_TARGET_WITH_MODEM -t GCC_ARM

Running the application

Drag and drop the application binary from `BUILD/YOUR_TARGET_WITH_MODEM/GCC_ARM/mbed-os-example-cellular.bin` to your Mbed Enabled target hardware, which appears as a USB device on your host machine.

Attach a serial console emulator of your choice (for example, PuTTY, Minicom or screen) to your USB device. Set the baudrate to 115200 bit/s, and reset your board by pressing the reset button.

You should see an output similar to this:

mbed-os-example-cellular
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

Troubleshooting

  • Make sure the fields `sim-pin-code`, `apn`, `username` and `password` from the `mbed_app.json` file are filled in correctly. The correct values should appear in the user manual of the board if using eSIM or in the details of the SIM card if using normal SIM.
  • Enable trace flag to have access to debug information `"mbed-trace.enable": true`.
  • Try both `TCP` and `UDP` socket types.
  • Try both `"lwip.ppp-enabled": true` and `"lwip.ppp-enabled": false`.
  • The modem may support only a fixed baud-rate, such as `"platform.default-serial-baud-rate": 9600`.
  • The modem and network may only support IPv6 in which case `"lwip.ipv6-enabled": true` shall be defined.
  • The SIM and modem must have compatible cellular technology (3G, 4G, NB-IoT, ...) supported and cellular network available.
  • Enable CIoT optimization for NONIP socket `control-plane-opt: true`.

If you have problems to get started with debugging, you can review the documentation for suggestions on what could be wrong and how to fix it.

License and contributions

The software is provided under Apache-2.0 license. Contributions to this project are accepted under the same license. Please see contributing.md for more info.

This project contains code from other projects. The original license text is included in those source files. They must comply with our license guide.

Jenkinsfile

Committer:
MACRUM
Date:
2019-05-10
Revision:
0:fb5e1789de47

File content as of revision 0:fb5e1789de47:

properties ([[$class: 'ParametersDefinitionProperty', parameterDefinitions: [
  [$class: 'StringParameterDefinition', name: 'mbed_os_revision', defaultValue: '', description: 'Revision of mbed-os to build. To access mbed-os PR use format "pull/PR number/head"'],
  [$class: 'BooleanParameterDefinition', name: 'smoke_test', defaultValue: true, description: 'Runs HW smoke tests on Cellular devices']
  ]]])

if (env.MBED_OS_REVISION == null) {
  echo 'First run in this branch, using default parameter values'
  env.MBED_OS_REVISION = ''
}
if (env.MBED_OS_REVISION == '') {
  echo 'Using mbed OS revision from mbed-os.lib'
} else {
  echo "Using given mbed OS revision: ${env.MBED_OS_REVISION}"
  if (env.MBED_OS_REVISION.matches('pull/\\d+/head')) {
    echo "Revision is a Pull Request"
  }
}

// Map RaaS instances to corresponding test suites
def raas = [
  "cellular_smoke_ublox_c027.json": "ruka"
  //"cellular_smoke_mtb_mts_dragonfly.json": "8119"
]

// Supported Modems
def targets = [
  "UBLOX_C027",
  "MTB_MTS_DRAGONFLY",
  "UBLOX_C030_U201"
  //"MTB_ADV_WISE_1570",
  //"K64F"
]

// Map toolchains to compilers
def toolchains = [
  ARM: "armcc",
  GCC_ARM: "arm-none-eabi-gcc",
  IAR: "iar_arm",
  ARMC6: "arm6"
  ]

def stepsForParallel = [:]

// Jenkins pipeline does not support map.each, we need to use oldschool for loop
for (int i = 0; i < targets.size(); i++) {
  for(int j = 0; j < toolchains.size(); j++) {
    def target = targets.get(i)
    def toolchain = toolchains.keySet().asList().get(j)
    def compilerLabel = toolchains.get(toolchain)
    def stepName = "${target} ${toolchain}"

    stepsForParallel[stepName] = buildStep(target, compilerLabel, toolchain)
  }
}

def parallelRunSmoke = [:]

// Need to compare boolean against string value
if (params.smoke_test == true) {
  echo "Running smoke tests"
  // Generate smoke tests based on suite amount
  for(int i = 0; i < raas.size(); i++) {
    def suite_to_run = raas.keySet().asList().get(i)
    def raasName = raas.get(suite_to_run)

    // Parallel execution needs unique step names. Remove .json file ending.
    def smokeStep = "${raasName} ${suite_to_run.substring(0, suite_to_run.indexOf('.'))}"
    parallelRunSmoke[smokeStep] = run_smoke(raasName, suite_to_run, toolchains, targets)
  }
} else {
  echo "Skipping smoke tests"
}

timestamps {
  parallel stepsForParallel
  parallel parallelRunSmoke
}

def buildStep(target, compilerLabel, toolchain) {
  return {
    stage ("${target}_${compilerLabel}") {
      node ("${compilerLabel}") {
        deleteDir()
        dir("mbed-os-example-cellular") {
          checkout scm
          def config_file = "mbed_app.json"

          // Configurations for different targets
          if ("${target}" == "UBLOX_C030_U201") {
            execute("sed -i 's/internet/JTM2M/' ${config_file}")
          }

          if ("${target}" == "UBLOX_C027") {
            execute("sed -i 's/TCP/UDP/' ${config_file}")
          }

          if ("${target}" == "MTB_ADV_WISE_1570") {
            execute("sed -i 's/TCP/UDP/' ${config_file}")
            execute("sed -i 's/\"lwip.ppp-enabled\": true,/\"lwip.ppp-enabled\": false,/' ${config_file}")
            execute("sed -i 's/\"platform.default-serial-baud-rate\": 115200,/\"platform.default-serial-baud-rate\": 9600,/' ${config_file}")
          }

          if ("${target}" == "K64F") {
            execute("sed -i 's/TCP/UDP/' ${config_file}")
            execute("sed -i 's/\"lwip.ppp-enabled\": true,/\"lwip.ppp-enabled\": false,/' ${config_file}")
            execute("sed -i 's/\"target_overrides\": {/\"macros\": [\"CELLULAR_DEVICE=QUECTEL_BG96\", \"MDMRXD=PTC16\", \"MDMTXD=PTC17\"], \"target_overrides\": {/' ${config_file}")
          }
          // Set mbed-os to revision received as parameter
          execute ("mbed deploy --protocol ssh")
          if (env.MBED_OS_REVISION != '') {
            dir("mbed-os") {
              if (env.MBED_OS_REVISION.matches('pull/\\d+/head')) {
                // Use mbed-os PR and switch to branch created
                execute("git fetch origin ${env.MBED_OS_REVISION}:_PR_")
                execute("git checkout _PR_")
              } else {
                execute ("git checkout ${env.MBED_OS_REVISION}")
              }
            }
          }

          execute ("mbed compile --build out/${target}_${toolchain}/ -m ${target} -t ${toolchain} -c --app-config ${config_file}")
        }
        if ("${target}" == "MTB_ADV_WISE_1570") {
          stash name: "${target}_${toolchain}", includes: '**/mbed-os-example-cellular.hex'
          archive '**/mbed-os-example-cellular.hex'
        }
        else {
          stash name: "${target}_${toolchain}", includes: '**/mbed-os-example-cellular.bin'
          archive '**/mbed-os-example-cellular.bin'
        }
        step([$class: 'WsCleanup'])
      }
    }
  }
}

def run_smoke(raasName, suite_to_run, toolchains, targets) {
  return {
    env.RAAS_USERNAME = "user"
    env.RAAS_PASSWORD = "user"
    // Remove .json from suite name
    def suiteName = suite_to_run.substring(0, suite_to_run.indexOf('.'))
    stage ("smoke_${raasName}_${suiteName}") {
      //node is actually the type of machine, i.e., mesh-test boild down to linux
      node ("linux") {
        deleteDir()
        dir("mbed-clitest") {
          git "git@github.com:ARMmbed/mbed-clitest.git"
          execute("git checkout ${env.LATEST_CLITEST_STABLE_REL}")
          dir("mbed-clitest-suites") {
            git "git@github.com:ARMmbed/mbed-clitest-suites.git"
            execute("git submodule update --init --recursive")
            execute("git all checkout master")
            dir("cellular") {
              execute("git checkout master")
            }
          }
                
          for (int i = 0; i < targets.size(); i++) {
            for(int j = 0; j < toolchains.size(); j++) {
              def target = targets.get(i)
              def toolchain = toolchains.keySet().asList().get(j)
              unstash "${target}_${toolchain}"
            }
          }     
          execute("python clitest.py --suitedir mbed-clitest-suites/suites/ --suite ${suite_to_run} --type hardware --reset \
                  --raas https://${raasName}.mbedcloudtesting.com:443 --tcdir mbed-clitest-suites/cellular --raas_queue --raas_queue_timeout 3600 \
                  --raas_share_allocs --failure_return_value -vvv -w --log log_${raasName}_${suiteName}")
          archive "log_${raasName}_${suiteName}/**/*"
        }
      }
    }
  }
}