One of my concerns on 600V design is how to make ADC readings in the 600V area. I need 3 x Current sensors, 1 x DC Voltage Sensor and 1(2) x Temperature sensors in addition to support for up to 3 resolver sensors as well as an external motor temperature sensor. That sums up to…
One of the things I am looking into is to have a bootloader through LoRa. Making one is straight forward, but I actually think I can use the build.in silicon bootloader as is… You probably know that all STM32 MCU’s comes with a build-in bootloader in ROM located at a special address. You invoke this…
It’s spring and summer comping up, and I am spending a bit of money on flowers every year so I would like to know more accurately their condition. Weather can change from very hot to very wet and not all plants get what they need from rain – some plants also get to much water…
This picture shows my current development ratnest of a moisture sensor connected to a LoRa unit. It’s a few extra components that have nothing to do with this project, but it’s a good reminder why I seldom do breadboard ratnests anymore. The wiring failure trate is very high, but in this case it worked out…
This block diagram only illustrate a few of the modules in the Abstraction Layer – loads of more will be added as needed. I started this library years ago so it has existed in various versions, but are re-designing it to be cleaner now. This is a C++ library designed to make coding of user…
I typically code ESP32, ESP8285, a lot of STM32, Pico, Linux and Windows to mention a few, so I want to be able to move code between those platforms with a minimum of hazle. For this purpose I create a C++ API that I call “Abstraction Layer”. I did not want to use the word…
I am working on “alDisplay” that is my embedded abstraction class to LCD/TFT diplays. This is quite a challenging task because I will have to deal with how specialized and proprietary these displays are and on top of that performance. The drawing above illustrate four layers – in my case actual hardware (orange) and three…
Ferrite RAM is one of the older RAM techniques used on old mainframes dating back to the 60s, but have in recent years also been popular as a replacement for EEPROM and flash because it is fast and have close to unlimited rewrites. I recently purchased a bunch of FRAM chips with the same interface…
One of the challenges I face using wireless communication is that it requires a bit of power/time to send signals. Wifi : ESP-M1 is the first solution I evaluate. This is the smallest of the ESP modules and can send using 120-170mA. Simply speaking if you have a battery with 1000mAH or( 1AH) you can…
A lot of IoT/Cloud solutions focus on access through internet, while I want a closed network of sensors in my house with a switch that enable very secure and restricted access from outside that network. I don’t want it to be fysical possible to break in without fysical access. But, I want to use Wifi…