The ESP32-C3 Super Mini boards arrived from Aliexpress, but mine are the flawed design which puts the Wifi antenna too close to the external 40 Mhz clock, impacting reception badly. Despite this, it found an identical list of Wifi APs as my phone and reported signal strengths only a bit worse. The boards have 400 Kb of RAM, 4Mb of flash, run at up to 160 Mhz, and have a 32-bit RISC-V instruction set. They are single-cored, missing hardware floating point, but do have hardware crypto acceleration. For €1.50 inc VAT delivered, that is a whole load of computing for the money. ...
A detailed technical diary entry is presented. The imposition of new EU tariffs on small packages from China is discussed, and the resulting costs are detailed. Furthermore, various electronic components — including PWM dimmers and ESP32 development boards — are reviewed. Technical issues, such as fuse failure in DC-DC converters and fibre network testing setups, are also explained. ...
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(Last updated: 2026-06-25 14:08:28 +0000 UTC)