Slowbeam.dev
🐞TroubleShooting

Error When Using MobaXterm SSH – “/etc/ssh_config line 1: Missing argument”

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🐞TroubleShooting

Using a Raspberry Pi as a Serial Communication Relay Server

Jan 7, 2026

A field issue occurred where serial communication between a PC and an Arduino became unstable at a distance of 3–4 meters. To resolve this without modifying the existing host application, a Raspberry Pi was introduced as a relay server using a Gigabit network and virtual COM ports. This post describes a practical, albeit inefficient, workaround for urgent situations.

Hardware
Error
🐞TroubleShooting

Repairing the Display on a FNIRSI 1014D Oscilloscope

Nov 15, 2025

Let’s try repairing the broken display on the FNIRSI 1014D oscilloscope

Daily
FNIRSI
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