{"id":31,"date":"2021-01-08T18:19:49","date_gmt":"2021-01-08T23:19:49","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/vahidnia\/?post_type=chapter&p=31"},"modified":"2021-04-06T15:46:30","modified_gmt":"2021-04-06T19:46:30","slug":"chapter-2","status":"publish","type":"chapter","link":"https:\/\/pressbooks.bccampus.ca\/cellulariot\/chapter\/chapter-2\/","title":{"raw":"Chapter 2: LTE-M Modem and AT Commands","rendered":"Chapter 2: LTE-M Modem and AT Commands"},"content":{"raw":"

2.1 Introduction<\/h1>\r\nIn the previous chapter, we briefly discussed different building blocks (layers) of an IoT solution from the core functional perspective. In this chapter and the next few chapters, we will discuss how to practically work with an LTE-M module to establish a CIoT connectivity scheme to transfer the data to the Internet. The high level architecture of the IoT project that we want to complete in this book is described in Figure2.1.\r\n\r\n[caption id=\"attachment_60\" align=\"aligncenter\" width=\"861\"]\"\" Figure2.1. High level architectural design of the IoT project[\/caption]\r\n\r\nIn this project, we will be using a Quectel BG96 LTE-M modem to exchange the data with the Internet through the cellular tower. The transmitted data is then stored and analyzed in the software backend (cloud platform) that gives full accessibility to the user to monitor, control and manage the device and network.\r\n\r\nFollowing the step-by-step instructions in this chapter, you will become familiar with the TELUS IoT Starter Kit and Avnet Quectel BG96 LTE Cat-M1\/NB-1 Shield. Also, you will be able to configure the Quectel BG96 modem using AT commands (instructions used to control a modem). Moreover, you will learn how to enable the GPS and acquire the location information using the AT commands.\r\n\r\nIn these lab series, you will learn how to create, prototype and develop an IoT product using the TELUS LTE-M IoT Starter Kit<\/a>[footnote]http:\/\/cloudconnectkits.org\/product\/telus-lte-m-iot-starter-kit[\/footnote]. You will practice how to connect to the LTE-M network (The modem supports both LTE-M and NB-IoT. However, in this book, you will only work with LTE-M). Then, you will use Microsoft Azure cloud services to manage, store and analyze the data. The starter kit integrates three stacked boards as shown in Figure 2.2. A brief introduction of each board is given here. Note that in this book you will only work with the BG96 module (top board) in the standalone mode.\r\n\r\n[caption id=\"attachment_61\" align=\"aligncenter\" width=\"306\"]\"\" Figure2.2. TELUS IoT starter kit[\/caption]\r\n

2.2\u00a0 Practical Tasks<\/h1>\r\n

A.\u00a0 BG96 Module<\/h2>\r\nBG96<\/a>[footnote]https:\/\/www.quectel.com\/product\/bg96.htm[\/footnote] is a series of ultra low-power (approximately 10 \u00b5A in PSM mode) dual-mode LTE Cat-M1\/Cat-NB1\/EGPRS module manufactured by Quectel Wireless Solutions. The maximum uplink (UL) and downlink (DL) data rates for this module are 375kbps and 300kbps, respectively. This module is certified by the major mobile network operators in the world (TELUS, Bell and Rogers in Canada) and has wide range of IoT use cases such as asset tracking, smart cattle, etc.\r\n\r\nThe module includes the BG96 modem and is equipped with some additional features such as SIM holder, Arduino shield interface (connectors compatible with Arduino extension boards such as WiFi), LTE and GPS antenna SMA connectors, USB port and configuration switches.\r\n\r\n[caption id=\"attachment_62\" align=\"aligncenter\" width=\"391\"]\"\" Figure2.3. Quectel BG96 module[\/caption]\r\n

B.\u00a0 Sensor Board<\/h2>\r\nThe IKS01A2 Sensor Board<\/a>[footnote]https:\/\/os.mbed.com\/components\/X-NUCLEO-IKS01A2\/[\/footnote] contains the following sensors:\r\n