fhunleth

nerves project management

1. Find sponsorship or grants
2. Find more collaborators

nerves website

1. docs
2. tutorials
3. pretty picture pass to make site look more professional

fhunleth

#!/bin/sh

#
# Upload new firmware to a target running nerves_firmware_ssh
#
# Usage:
#   upload.sh [destination IP] [Path to .fw file]
#
# If unspecifed, the destination is nerves.local and the .fw file
# is naively guessed

fhunleth

#include <stdio.h>
#include <math.h>

/* 
Experiment with the lgamma function. This function makes it possible to approximate
factorials of very large numbers and runs incredibly fast.

See https://github.com/bminor/musl/blob/master/src/math/lgamma_r.c for how lgamma is 
calculated.

fhunleth

Only trace calls to exec

strace -s 1024 -e abbrev=none -qfeexecve <program and args>

fhunleth

Publish and deploy the currently built firmware

mix nerves_hub.firmware publish --key fwsigner1 mix nerves_hub.deployment update qa firmware

fhunleth

./jq-linux64 -n \
    --arg meta_uuid $(grep 'meta-uuid' <<< $FW_META | awk -F"=" '{ print $2}') \
    --arg meta_version "$(grep 'meta-version' <<< $FW_META | awk -F"=" '{ print $2}')" \
    --arg meta_vcs_identifier "$(grep 'meta-vcs-identifier' <<< $FW_META | awk -F"=" '{ print $2}')" \
    --arg meta_platform "$(grep 'meta-platform' <<< $FW_META | awk -F"=" '{ print $2}')" \
    --arg meta_creation_date "$(grep 'meta-creation-date' <<< $FW_META | awk -F"=" '{ print $2}')" \
    --arg meta_misc "$(grep 'meta-misc' <<< $FW_META | awk -F"=" '{ print $2}')" \
    '{channel: "C41SHHGQ5", as_user: true, blocks: [
        {type: "section", block_id: "text1", text: {type: "mrkdwn", text: "*A new FarmBot Firmware is available*"}}, 
        {type: "context", elements: [

fhunleth

defmodule Barometer do
  alias ElixirALE.I2C

  @sealevel_pa 101325

  @doc """
  Put the BMP280 in normal mode and sample the temperature and
  pressure sensor at ultra high resolution.
  """
  def enable() do

fhunleth

UPDATE: THIS WAS WRITTEN BEFORE BlueHeron EXISTED

This is a braindump of my progress over the weekend to look into Bluetooth support on Nerves. While Bluetooth has a lot of specs, supporting a subset of BLE that makes it easy for Nerves devices to communicate with cell phones and back would be generally useful.

There are two options for BLE support on Nerves:

1. Make a custom Nerves system that uses bluez
2. Use Harald

fhunleth

umask 0022 && make -C /home/fhunleth/nerves/nerves_system_br/buildroot-2020.05 O=/home/fhunleth/nerves/nerves_system_br/o/rpi0/. 
for p in https+https://github.com/erlang/otp/archive/OTP-23.0.2.tar.gz ; do \
	if test ! -e /home/fhunleth/dl/erlang/`basename $p` ; then \
		echo ">>> erlang 23.0.2 Downloading" ; \
		break ; \
	fi ; \
done
mkdir -p /home/fhunleth/dl/erlang
PATH="/home/fhunleth/nerves/nerves_system_br/o/rpi0/host/bin:/home/fhunleth/nerves/nerves_system_br/o/rpi0/host/sbin:/home/fhunleth/.asdf/shims:/home/fhunleth/.asdf/bin:/home/fhunleth/.local/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin" BR2_DL_DIR="/home/fhunleth/nerves/nerves_system_br/buildroot-2020.05/dl" BUILD_DIR=/home/fhunleth/nerves/nerves_system_br/o/rpi0/build O=/home/fhunleth/nerves/nerves_system_br/o/rpi0 flock /home/fhunleth/dl/erlang/ support/download/dl-wrapper -c '23.0.2' -d '/home/fhunleth/dl/erlang' -D '/home/fhunleth/dl' -f 'OTP-23.0.2.tar.gz' -H 'package/erlang//erlang.hash' -n 'erlang-23.0.2' -N 'er

fhunleth

=============================================
  Extended CSD rev 1.8 (MMC 5.1)
=============================================

Card Supported Command sets [S_CMD_SET: 0x01]
HPI Features [HPI_FEATURE: 0x01]: implementation based on CMD13
Background operations support [BKOPS_SUPPORT: 0x01]
Max Packet Read Cmd [MAX_PACKED_READS: 0x3c]
Max Packet Write Cmd [MAX_PACKED_WRITES: 0x3c]
Data TAG support [DATA_TAG_SUPPORT: 0x01]