Specific Pelion ready example using features of Seeed Wio boards including cellular and SD Card

Dependencies:   WS2812 PixelArray

Fork of simple-mbed-cloud-example-wio_3g by Toyomasa Watarai


This example application is not maintained and not recommended. It uses an old version of Mbed OS, Pelion DM, and Arm toolchain. It doesn't work with Mbed Studio.

Please use: https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-pelion/

This example is known to work great on the following platforms:
Seeed Wio 3G and Seeed Wio LTE-M1/NB1(BG96) over cellular and using SD card.


Follow the Quick-Start instructions: https://cloud.mbed.com/quick-start

Example functionality

This example showcases the following device functionality:

  • Allow the user to change the state of the board LED from Pelion LWM2M led_state resource and PUT request.

Instructions to use this program with mbed CLI

1. Import the application into your desktop:

mbed import https://os.mbed.com/teams/Seeed/code/pelion-example-common/

cd pelion-example-common

2. Install the CLOUD_SDK_API_KEY


For instructions on how to generate your API key, please see the documentation.

3. Initialize firmware credentials (done once per repository). You can use the following command:

mbed dm init -d "<your company name in Pelion DM>" --model-name "<product model identifier>" -q --force

If above command do not work for your Mbed CLI, please consider upgrading Mbed CLI to version 1.9.x or above.

  • Set APN name, username and password in the mbed_app.json.

            "nsapi.default-cellular-plmn"      : "\"00000\"",
            "nsapi.default-cellular-sim-pin"   : "\"0000\"",
            "nsapi.default-cellular-apn"       : "\"apn\"",
            "nsapi.default-cellular-username"  : "\"username\"",
            "nsapi.default-cellular-password"  : "\"password\""


For the Wio LTE-M1/NB1(BG96) target, PLMN (Public land mobile network) should be specified to get quick connection to the network. This is usually found first 5 digit from your SIM card IMSI (International Mobile Subscriber Identity) number. e.g. 44052

4. Compile and program:

mbed compile -t <toolchain> -m WIO_3G

(supported toolchains : GCC_ARM / ARM / IAR)


  • Make sure the fields nsapi.default-cellular-sim-pin, nsapi.default-cellular-apn, nsapi.default-cellular-username and nsapi.default-cellular-password from the mbed_app.json file are filled in correctly. The correct values should appear in the user manual in the details of the SIM card.
  • 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 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.
Thu May 16 07:16:24 2019 +0000
Add PLMN info for the BG96

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MACRUM 0:91c16b1711c2 1 // ----------------------------------------------------------------------------
MACRUM 0:91c16b1711c2 2 // Copyright 2016-2017 ARM Ltd.
MACRUM 0:91c16b1711c2 3 //
MACRUM 0:91c16b1711c2 4 // SPDX-License-Identifier: Apache-2.0
MACRUM 0:91c16b1711c2 5 //
MACRUM 0:91c16b1711c2 6 // Licensed under the Apache License, Version 2.0 (the "License");
MACRUM 0:91c16b1711c2 7 // you may not use this file except in compliance with the License.
MACRUM 0:91c16b1711c2 8 // You may obtain a copy of the License at
MACRUM 0:91c16b1711c2 9 //
MACRUM 0:91c16b1711c2 10 // http://www.apache.org/licenses/LICENSE-2.0
MACRUM 0:91c16b1711c2 11 //
MACRUM 0:91c16b1711c2 12 // Unless required by applicable law or agreed to in writing, software
MACRUM 0:91c16b1711c2 13 // distributed under the License is distributed on an "AS IS" BASIS,
MACRUM 0:91c16b1711c2 14 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
MACRUM 0:91c16b1711c2 15 // See the License for the specific language governing permissions and
MACRUM 0:91c16b1711c2 16 // limitations under the License.
MACRUM 0:91c16b1711c2 17 // ----------------------------------------------------------------------------
MACRUM 0:91c16b1711c2 18
MACRUM 0:91c16b1711c2 21 #endif
MACRUM 0:91c16b1711c2 22
MACRUM 0:91c16b1711c2 23 #include <stdint.h>
MACRUM 0:91c16b1711c2 24
MACRUM 0:91c16b1711c2 25 #ifdef MBED_CLOUD_DEV_UPDATE_ID
MACRUM 0:91c16b1711c2 26 const uint8_t arm_uc_vendor_id[16] = { "dev_manufacturer" };
MACRUM 0:91c16b1711c2 27 const uint16_t arm_uc_vendor_id_size = sizeof(arm_uc_vendor_id);
MACRUM 0:91c16b1711c2 28
MACRUM 0:91c16b1711c2 29 const uint8_t arm_uc_class_id[16] = { "dev_model_number" };
MACRUM 0:91c16b1711c2 30 const uint16_t arm_uc_class_id_size = sizeof(arm_uc_class_id);
MACRUM 0:91c16b1711c2 31 #endif
MACRUM 0:91c16b1711c2 32
MACRUM 0:91c16b1711c2 33 #ifdef MBED_CLOUD_DEV_UPDATE_CERT
MACRUM 0:91c16b1711c2 34 const uint8_t arm_uc_default_fingerprint[32] = { 0 };
MACRUM 0:91c16b1711c2 35 const uint16_t arm_uc_default_fingerprint_size =
MACRUM 0:91c16b1711c2 36 sizeof(arm_uc_default_fingerprint);
MACRUM 0:91c16b1711c2 37
MACRUM 0:91c16b1711c2 38 const uint8_t arm_uc_default_certificate[1] = { 0 };
MACRUM 0:91c16b1711c2 39 const uint16_t arm_uc_default_certificate_size =
MACRUM 0:91c16b1711c2 40 sizeof(arm_uc_default_certificate);
MACRUM 0:91c16b1711c2 41 #endif