Mika Tuupola

Time 2020-12-09 21:05:13

Web Name: Mika Tuupola

WebSite: http://www.appelsiini.net

ID:128980

Keywords:

Mika,Tuupola,

Description:

RISC-V is gaining traction and some development boards have already popped up. One of them is the widely available Sipeed Longan Nano. Written information is a bit sparse at the moment. Let s try to fix this with a quick writeup on wiring and programming the board. If you just want to see what the board can do here is a video instead. Mon, May 25, 2020 One of the things which makes embedded programming so interesting is that you are constantly dealing with restricted resources. Playing video files is quite resource heavy. Let s see how ESP32 can handle this. If you have short attention span here is a video instead. Thu, Apr 16, 2020 What started as a project to learn C, I have now been using in all my hobby projects. HAGL is a hardware agnostic graphics library for embedded projects. It supports basic geometric primitives, bitmaps, blitting, fixed width fonts and an optional framebuffer. Sat, May 19, 2018 My life has come to a full circle. I remember sitting in my parents basement in the late 90 s programming the fire effect using mixture of Borland Turbo Pascal and Assembler. I had an Intel 80386 which also had the 80387 coprocessor. I remember downloading Lode s graphics tutorials from FidoNet. It was all magic.Last week I found myself reading the same tutorials and creating the same fire effect again. Instead of Intel PC, it was written for ESP32 based M5Stack and using C programming language. Fri, Feb 23, 2018 Magnetometers are used to measure the strength of a magnetic field. They can also be used to determine orientation and to compensate gyro drift. Magnetometer provides the last three degrees of freedom in 9DOF sensors.There is one problem though, magnetometers are prone to distortion. While evaluating M5Stack for a sidehustle project I created a proof of concept which needed to access wifi network, query an API and download an image. Wifi geolocation which displays a static Google map seemed like a perfect fit. Here are some notes about it. Sat, Jan 27, 2018 M5Stack is an absolutely beautiful ESP32 based enclosure and development board. It has 320x240 TFT screen, three buttons, sd card slot, Grove I2C connector and can be powered with LiPo battery.Download the Micropython FirmwareYou could download the MicroPython firmware from the downloads page. But why bother when we have the commandline. First find the download link.$ curl --silent http://micropython.org/download | grep firmware/esp32 | gawk -F a +href= -v RS= RT{print $2} http://micropython.org/resources/firmware/esp32-20180127-v1.9.3-240-ga275cb0f.bin Sun, Sep 24, 2017 WiPy is a bit pricey but good quality ESP32development board from Pycom. I got mine fromPimoroni. Pycom does offertheir own firmware updater but for my taste it has too much magic going on. Iprefer to do things from commandline and I stay in control and to see exactlywhat update is doing. Quick Googling did not reveal anything so here is my upgradeprocedure.Download the Latest Pycom FirmwareFor starters we need to find the latest Pycom firmware. Links can be foundfrom their forums. Or you can just query the filename from their softwareupdate service.$ curl https://software.pycom.io/findupgrade?key=wipy.wipy%20with%20esp32 redirect=false type=all key : wipy.wipy with esp32 , file : https://software.pycom.io/downloads/WiPy-1.7.10.b1.tar.gz , version : 1.8.0.b1 , intVersion :71303297, hash : f6c30bf8b08c50d188f727822be320061ed7847b Sun, Aug 6, 2017 Branca is a catchy name for IETF XChaCha20-Poly1305 AEAD message with an additional version number and timestamp. It is well suited to be used as an authenticated and encrypted API token. Branca specification does not specify the payload format. Among others you can use for example JWT payloads but still have modern encryption and smaller token size provided by Branca.Currently there are implemenationsfor JavaScript, Elixir, Go and PHP and a command line tool for creating and inspecting tokens. Mon, May 29, 2017 The popularity of WiFi networks has been rising rapidly during the last 15 years. In urban areas hotspots are ubiquous. These hotspots together with trilateration algorithms provide a cheap way to find out yours or someone elses location.Because of my previous work with Apple location services I wanted to figure out how trilateration works. Being a school dropout I am really really bad in mathematics. However I consider myself good at trial and error so I reckon this should be doable.

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