Conexio Technologies' Stratus is an open source LTE-M/NB-IoT Cellular-IoT development kit based around Nordic Semi nRF9160. Stratus can charge battery from solar power & comes with 500 MB global data plan. Stratus will be available on Crowd Supply.
Arduino Pro adds Portenta H7 Lite, a stripped down version of Portenta H7, without the high resolution video interface and Wi-Fi and Bluetooth features. H7 Lite costs $31 less than H7, and is aimed at more affordable IoT and Industry 4.0 solutions.
Getting Started with Raspberry Pi Pico : RP2040 Microcontroller Board – Pinout, Schematic and Programming Tutorial
Raspberry Pi Pico Microcontroller Board – Pinout Diagrams
How to Create A Standalone Raspberry Pi Pico C/C++ Project in Windows and Build from Command-Line and VS Code
Noel 230V/90W Digital Temperature Controlled Soldering Iron Review & Teardown