This document discusses NB-IoT and an ESPectro32 workshop. It introduces NB-IoT as a low power wide area network technology for IoT. It describes the ESPectro32 board and how to set up a development environment. It also discusses connecting the ESPectro32 to an NB-IoT backpack module to send telemetry data via NB-IoT networks. Code examples are provided for sending AT commands and communicating with an NB-IoT network using HTTP and MQTT protocols.

1. ESPectro32 & NB-IoT
Workshop
From things to Cloud with NB-IoT

2. $ whoami
Alwin Arrasyid
email - winter@dycode.com
twitter - @alwin_wint3r
github - alwint3r

3. IoT Software Lead

5. Things
Sensors, actuators, MCU/MPU,
network, energy, firmware

6. Things in IoT are made of....

7. ESPectro32 V2
ESPectro32 V2, an improvement of an
already a good board ESPectro32.

8. ESPectro32 V2 - Top View

9. ESPectro32 V2 - Bottom View

10. ESPectro32 V2 - Pin Out

11. Start Coding
Open your VS Code

12. Starting a new project
•Create a new project anywhere suitable for your needs.
•Open the folder from VS Code
•Then open terminal in VS Code
•Initialize PlatformIO project
pio init -b espectro32

13. Install ESPectro32 library
•This library is necessary for accessing features on
ESPectro32 board
•Run pio lib install ESPectro32
•Or you can install it globally by running
pio lib --global install ESPectro32

14. Arduino program structure
#include <Arduino.h>
void setup() {
}
void loop() {
}

15. ESPectro32 library
#include <Arduino.h>
#include <ESPectro32_Board.h>
void setup() {
ESPectro32.begin();
}
void loop() {
}

16. Connectivity
PAN, LPWAN, Cellular

17. LPWA
Low Power Wide Area Network
Low data throughput = high sensitivity = long
range
Relatively low cost
Multiple access, one-to-many architecture
Using licensed or license-free spectrum

18. Range vs Speed

19. Power vs Range

20. LPWA Technologies
License-free spectrum Licensed spectrum

21. NB-IoT
• 3GPP-standarised technology marked as Release 13
• 180 kHz RF front-end
• Deployment options: in-band, guard band, re-farmed spectrum or
standalone
• Uplink: 250 kbit/s half-duplex (multi-tone), 20 kbit/s (single-tone)
• Downlink: 250 kbit/s
• Latency: 1.6s-10s
• Device Transmit Power: 23 dBm
• Coverage: 164 dB

22. NB-IoT Chipset Manufacturers

23. NB-IoT Modules

24. NB-IoT Software
•Modules provide AT command interfaces through UART
•Support for UDP/IP and even TCP/IP based protocols

25. NB-IoT Backpack

26. NB-IoT Backpack
•Uses NB-IoT module u-blox SARA-R410M-02B
• Supports LTE Cat.NB1 (NB-IoT) & LTE Cat M1
• Supports band 2, 3, 4, 5, 8, 12, 13, 20, 28
• Supports UDP/IP and TCP/IP protocols
• eDRX, Power Saving Mode
•GPS module uses u-blox CAM M8
XL Axiata uses band 8

27. ESPectro32 & Rasberry Pin Layout

28. Arduino Pin Layout

29. Sending AT commands
•Relay the AT command input from MCU to NB-IoT shield
User Input -> MCU's serial -> NB-IoT shield serial
NB-IoT shield serial -> MCU's serial -> User's terminal
•Example code of this use case
github.com/alwint3r/ESPectro32-NBIoT-Serial

30. NB-IoT AT Commands Reference
•bit.ly/nbiotshieldat

31. Libraries
•Sodaq_nbIOT (dycodex's fork)
• bit.ly/dycodexnbiotlib
• fork of github.com/SodaqMoja/Sodaq_nbIOT
•ESP SARA NB-IoT (specific for ESP32-based board like
ESPectro32)
• github.com/dycodex/esp-sara-nbiot

32. More Code
•Sending telemetry to FlexIoT via NB-IoT using HTTP
github.com/alwint3r/FlexIoT-HTTP-NBIoT
•Sending telemetry to FlexIoT via NB-IoT using MQTT
github.com/alwint3r/FlexIoT-NBIoT