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How to configure GR-M10-RP connected to Raspberry Pi 3B/4

Physical issues

• You need to cut some parts of the plastic case to hold the protruding SMA connector from GR-M10-RP
• To keep the BBR info of u-blox MAX-M10S in GR-M10-RP, a CR1220 lithium battery must be installed

Default UART speed

• The default UART speed is 38400bps

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# Put this file at ~/.config/ghostty/config

theme = jj1bdx-night-owl

font-size = 15
font-family = CommitMono
font-family = Noto Sans Mono CJK JP
# disable ligature
# (comment out the features to enable ligature)
font-feature = -calt

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#!/usr/bin/env python3
from skyfield import api, almanac

load = api.Loader('~/.skyfield-data')
ts = load.timescale()
planets = load('de421.bsp')

pm95tp = api.Topos(latitude = '35.645 N',
                    longitude = '139.623 E',
                    elevation_m = 45.0)

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0000   0   80   0.0   1500.   0   JJ1BDX PM95 37                        FST4

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#!/opt/homebrew/bin/bash
# NOTE WELL: this script includes CONFIDENTIAL API KEY!
API='Your API Key'
# API password
PASS='App password'
CALL='Your callsign'
EMAIL='Your account email'
FILE=$1
#
# You can add "-v -i" option to curl for debugging

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Ubuntu conversion from Desktop to Server

Source: https://www.technomancer.com/archives/789

# Do this as a root
# Install Ubuntu Server, after stopping unattended upgrades
systemctl disable unattended-upgrades
systemctl set-default multi-user.target
apt update && apt -y upgrade 

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Installing TeXLive on Ubuntu

For Ubuntu 26.04 LTS and TeXLive 2026

Don't

• Do not use default given packages. They are too old and obsolete.

Remove installed packages by apt first

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ATECC608A I2C Notes

Here be dragons

WARNING: AS THE DEVICE CAN BE CONFIGURED ONLY ONCE, PLEASE BE WARNED THAT YOU MIGHT EASILY BRICK THE CHIP! USE AT YOUR OWN RISK!

Circuit

Please make sure to use proper circuit for ATECC608A with pullups and decoupling capacitors when hooked to a MCU. A Raspberry Pi might also work without external components just using internal pullups.

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VOLK v3.1.0 volk_32fc_s32f_atan2_32f() anomaly on input element 0+0j

VOLK v3.1.0 volk_32fc_s32f_atan2_32f() returns -NaN when input has a 0+0j element for the avx2 and avx2_fma kernels.

Note: j denotes an imaginary number, where j^2 = -1.

Summary

VOLK v3.1.0 volk_32fc_s32f_atan2_32f() returns -nan for the following kernels:

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defaults write -g NSScrollViewRubberbanding -int 0
defaults write -g NSAutomaticWindowAnimationsEnabled -bool false
defaults write -g NSScrollAnimationEnabled -bool false
defaults write -g NSWindowResizeTime -float 0.001
defaults write -g QLPanelAnimationDuration -float 0
defaults write -g NSScrollViewRubberbanding -bool false
defaults write -g NSDocumentRevisionsWindowTransformAnimation -bool false
defaults write -g NSToolbarFullScreenAnimationDuration -float 0
defaults write -g NSBrowserColumnAnimationSpeedMultiplier -float 0
defaults write com.apple.dock autohide-time-modifier -float 0