Blog – Systev

24-May-2023

Firmware update over the air for the ESP32

I just published on GitHub some code which presents one possible way to implement firmware update over the air for the ESP32:

esp32-fuota – Sample application for the ESP32
docker-fuota-server – Sample update server

07-April-202317-April-2023

Displaying tracks with QGIS

In order to test some location data generated by an embedded application I’m developing for one of my clients, I need to plot tracks on a map. I already used QGIS 10 years ago, and I have kept in mind that it was supporting Python scripting. This could accelerate my tests a lot. So, let’s go for it.

25-September-2021

Software engineering for embedded systems

Classes or books about software engineering for embedded systems:

Philip Koopman’s class, at Carnegie Mellon University

19-August-202121-July-2023

C – a list of resources

Updated: 21-Jul-2023

Language

The GNU C Reference Manual
The GNU C Library Reference Manual
The GNU C Preprocessor
The C Library Reference Guide
C reference
comp.lang.c FAQ
Summary of formatted output (printf)
GNU Make Manual
Modern C – Jens Gustedt
C11:
- a very rapid overview and some links to more information about the latest C standard, C11
- the latest publicly available version of the C11 standard is the document WG14 N1570, dated 2011-04-12. This is a WG14 working paper, but it reflects what was to become the standard at the time of issue (source)
C99:
- Rationale for International Standard – Programming Languages – C (C99)
- the latest publicly available version of the C99 standard is the combined C99 + TC1 + TC2 + TC3, WG14 N1256, dated 2007-09-07. This is a WG14 working paper, but it reflects the consolidated standard at the time of issue (source)
Embedded C:
- the latest draft, approved for publication, is in document N1169 (source)

18-July-2021

A list of sensor development kits

I started a list of sensor development kits, on Github this time.

23-January-202123-January-2021

IoT and Connected Objects

A presentation providing an overview of the domain that is today called IoT or connected objects is available here: https://pascalbod.github.io/iot-en-presentation.

The perspective is the one of the system integrator, who has to make a system fulfilling (more or less) detailed functional specifications,

29-April-202016-March-2022

LoRa and LoRaWAN reference documents

Updated: 16-Mar-2022

LoRa

LoRa modulation basics (from Semtech website)

LoRaWAN

27-April-202016-March-2022

LoRaWAN data rates and payload sizes

Updated: 16-Mar-2022

Data Rate	Configuration	Indicative Bit Rate (b/s)	N
0	LoRa: SF12 / 125 kHz	250	51
1	LoRa:SF11 / 125 kHz	440	51
2	LoRa:SF10 / 125 kHz	980	51
3	LoRa:SF9 / 125 kHz	1760	115
4	LoRa:SF8 / 125 kHz	3125	222
5	LoRa:SF7 / 125 kHz	5470	222
6	LoRa:SF7 / 250 kHz	11000	222
7	FSK: 50 kbps	50000	222

EU863-870 Data Rates – Source: https://resources.lora-alliance.org/technical-specifications/rp2-1-0-3-lorawan-regional-parameters
N: maximum application payload length, in the absence of the optional FOpt control field

27-December-201930-November-2021

Edge AI

Updated: 30-Nov-2021

Hardware

Akida Neural Processor, from brainchip
DBM10, from DSP Group – ultra-low-power SoC optimized for voice and sensor processing
Ergo, from Perceive
GAPuino GAP8 development board, from GreenWaves Technologies
GrAI One, from GrAI Matter Labs
Hailo-8
IIS2ICLX – 2-axis Digital Inclinometer with Embedded Machine Learning Core
Innatera – neuromorphic processors for spiking neural networks (SNN)
Kneron
MAX78000, from Maxim – Arm Cortex-M4 Processor with FPU-Based Microcontroller with Convolutional Neural Network Accelerator
Mythic: analog compute
NDP120, from Syntiant – always-on speech & audio recognition processors – NDP200: always-on vision processor
~~Neural Sensor Platform, from Eta Compute~~
RAP, from AlphaICs – more info on EET Asia
Sipeed MaixCube – Development Platform Based on K210 (RISC-V)
Synsense: event-driven neuromorphic processors for real-time vision processing
TENSAI Platform, from Eta Compute – 17-Dec-2020: Eta Compute Pivots Away From Silicon, Signs Deal with Synaptics – EE Times
xcore.ai

26-October-201903-November-2019

Connecting a battery to the mangOH Yellow

I attended the Sierra Wireless Innovation Summit, on last Wednesday and Thursday. Which means that I got the opportunity to play with a mangOH Yellow board and Octave, and that I brought back home the board 🙂

Before starting to write my first own application, today I connected a lithium-ion battery to the board, and configured Octave to display charge status. Which took me less than one minute. Impressive.