$ pinout
bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
,--------------------------------.
| oooooooooooooooooooo J8   +======
| 1ooooooooooooooooooo  PoE |   Net
|  Wi                    1o +======
|  Fi  Pi Model 4B  V1.4 oo      |
|        ,----. +---+         +====
| |D|    |SoC | |RAM|         |USB3
| |S|    |    | |   |         +====
| |I|    `----' +---+            |
|                   |C|       +====
|                   |S|       |USB2
| pwr   |hd|   |hd| |I||A|    +====
`-| |---|m0|---|m1|----|V|-------'

Revision           : d03114
SoC                : BCM2711
RAM                : 8GB
Storage            : MicroSD
USB ports          : 4 (of which 2 USB3)
Ethernet ports     : 1 (1000Mbps max. speed)
Wi-fi              : True
Bluetooth          : True
Camera ports (CSI) : 1
Display ports (DSI): 1

J8:
   3V3  (1) (2)  5V    
 GPIO2  (3) (4)  5V    
 GPIO3  (5) (6)  GND   
 GPIO4  (7) (8)  GPIO14
   GND  (9) (10) GPIO15
GPIO17 (11) (12) GPIO18
GPIO27 (13) (14) GND   
GPIO22 (15) (16) GPIO23
   3V3 (17) (18) GPIO24
GPIO10 (19) (20) GND   
 GPIO9 (21) (22) GPIO25
GPIO11 (23) (24) GPIO8 
   GND (25) (26) GPIO7 
 GPIO0 (27) (28) GPIO1 
 GPIO5 (29) (30) GND   
 GPIO6 (31) (32) GPIO12
GPIO13 (33) (34) GND   
GPIO19 (35) (36) GPIO16
GPIO26 (37) (38) GPIO20
   GND (39) (40) GPIO21

POE:
TR01 (1) (2) TR00
TR03 (3) (4) TR02

For further information, please refer to https://pinout.xyz/

Traceback (most recent call last):
  File "/home/<username>/Documents/aws-iot-device-sdk-python/samples/basicPubSub/basicPubSub.py", line 18, in <module>
    from AWSIoTPythonSDK.MQTTLib import AWSIoTMQTTClient
ModuleNotFoundError: No module named 'AWSIoTPythonSDK'

# サンプルレポジトリのルートディレクトリで
$ sudo python setup.py install

$ python3 samples/basicPubSub/basicPubSub.py --endpoint foo.iot.ap-northeast-1.amazonaws.com --rootCA ./certs/AmazonRootCA1.pem --cert ./certs/bar-certificate.pem.crt --key ./certs/bar-private.pem.key 

writeReg
    bus.write_byte_data(i2c_address, reg_address, data)
OSError: [Errno 121] Remote I/O error

$ sudo /etc/init.d/cron status
● cron.service - Regular background program processing daemon
     Loaded: loaded (/lib/systemd/system/cron.service; enabled; vendor preset: enabled)
     Active: active (running) since Sat 2023-11-11 20:48:58 JST; 21min ago

curl https://mechatrax.github.io/setup.sh | sudo bash
sudo raspi-config nonint do_netconf 2
sudo apt install 4gpi-utils 4gpi-net-mods 4gpi-networkmanager
sudo nmcli con add type gsm ifname "*" con-name {任意の接続名} apn {apn} user {user-name} password {password}

$ nmcli connection show
NAME                UUID                                  TYPE      DEVICE   
musen-lan    xxxxx-yyyy-zzzz-aaaa-asfjklkrewo  wifi      wlan0    
xxxx-sim          56b4ee0c-xxxx-yyyy-zzzz-95d87bvb5u77  gsm       cdc-wdm0 

sudo iwlist wlan0 scan | grep ESSID
wlan0 Interface doesn't support scannning : Device or resource busy

ClientAliveInterval 60
ClientAliveCountMax 60

#rootユーザでのログインを禁止
#上の方に記載されている
#「#PermitRootLogin prohibit-password」を「PermitRootLogin no」に変更
PermitRootLogin no

#パスワード認証を無効化して公開鍵認証のみ許可
#真ん中付近に記載されている
#「#PasswordAuthentication yes」を「PasswordAuthentication no」に変更
PasswordAuthentication no

#空パスワードを無効に
#PasswordAuthenticationのすぐ下に記載されている
#「#PermitEmptyPasswords no」を「PermitEmptyPasswords no」に変更
PermitEmptyPasswords no

sudo /etc/init.d/ssh restart

$ pip3 install smbus2
...
Installing collected packages: smbus2
Successfully installed smbus2-0.4.3

sudo apt-get install git

git clone https://github.com/SWITCHSCIENCE/BME280.git

$ python Python27/bme280_sample.py 
temp : 23.71  ℃
pressure : 1009.40 hPa
hum :  20.60 ％

import os
import sys
sys.path.append(os.path.join(os.path.dirname(__file__),'../../../'))

from directory1.directory2 import filename

filename.function()

script_dir=$(cd $(dirname ${BASH_SOURCE:-$0}); pwd)

python3 ${script_dir}/path/to/file.py
# 以下、ファイルパスを指定する箇所にはもれなく${script_dir}を付加して絶対パスに展開されるようにする

# サブスクライブしていたトピックにメッセージが投稿されたら呼ばれる関数
def customCallback(client, userdata, message):
    print("Received a new message: ")
    print(message.payload)
    print("from topic: ")
    print(message.topic)
    print("--------------\n\n")

    parsed_json = json.loads(message.payload)
    if ("cmd" in parsed_json):
        cmd = ''
        if(parsed_json["cmd"] == "shutdown"):
            cmd = 'sudo shutdown -h now'
        elif(parsed_json["cmd"] == "reboot"):
            cmd = 'sudo reboot'

        if(cmd != ''):
            print(cmd)
            subprocess.Popen(cmd, shell=True)

# Connect and subscribe to AWS IoT
myAWSIoTMQTTClient.connect()

if args.mode == 'both' or args.mode == 'subscribe':
    myAWSIoTMQTTClient.subscribe(topic, 1, customCallback)

while True:
    time.sleep(1)

[Unit]
Description = Subscribe and wait for MQTT topic
Requires = network-online.target 
After = network-online.target    # After=network.targetではうまく動かなかった

[Service]
ExecStart = /usr/bin/bash subscribe.sh # pythonスクリプトの場合は、 /usr/bin/python3 subscribeTopic.py のようにする
WorkingDirectory = /path/to/script
User = user-name
Restart = always
RestartSec = 5
Type = simple

[Install]
WantedBy=multi-user.target

sudo systemctl enable some.service

sudo systemctl disable some.service

$ diskutil list
/dev/disk26 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *7.9 GB     disk26
   1:             Windows_FAT_32 boot                    268.4 MB   disk26s1
   2:                      Linux                         7.6 GB     disk26s2

$ diskutil umountDisk /dev/disk26
$ sudo dd if=/dev/disk26 of=backup.img bs=1m
7497+0 records in
7497+0 records out
7861174272 bytes transferred in 1147.083625 secs (6853183 bytes/sec)

Postfix (main.cf) was not set up.  Start with
  cp /usr/share/postfix/main.cf.debian /etc/postfix/main.cf
.  If you need to make changes, edit /etc/postfix/main.cf (and others) as 
needed.  To view Postfix configuration values, see postconf(1).

After modifying main.cf, be sure to run 'systemctl reload postfix'.

Created symlink /etc/systemd/system/multi-user.target.wants/postfix.service → /lib/systemd/system/postfix.service.

sls deploy --aws-profile aws-profile-name

% sls invoke -f hello -d '{"key":"value"}' --aws-profile aws-profile-name
{
    "statusCode": 200,
    "body": "{\"message\": \"Go Serverless v1.0! Your function executed successfully!\", \"event\": {\"key\": \"value\"}}"
}

% sls remove --aws-profile <aws-profile-name>
Removing <service-name> from stage dev (ap-northeast-1)

✔ Service <service-name> has been successfully removed (26s)