Getting GPS location using NEO-7M-0-000 Blox with ESP32

#include <WiFi.h>

const char *ssid = "wifi";
const char *password = "pass";

// GPS UART
HardwareSerial GPS(2); // UART2

// Standard NMEA TCP port
WiFiServer server(10110);

// Allow multiple clients
WiFiClient clients[5];

String line;

void setup() {
  Serial.begin(115200);

  // GPS on GPIO21 (RX), GPIO22 (TX)
  GPS.begin(9600, SERIAL_8N1, 21, 22);

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);

  Serial.print("Connecting");

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println();
  Serial.print("Connected: ");
  Serial.println(WiFi.localIP());

  server.begin();
  server.setNoDelay(true);

  Serial.println("NMEA TCP server started on port 10110");
}

void loop() {

  // Accept new clients
  if (server.hasClient()) {

    for (int i = 0; i < 5; i++) {

      if (!clients[i] || !clients[i].connected()) {

        if (clients[i])
          clients[i].stop();

        clients[i] = server.available();
        clients[i].setNoDelay(true);

        Serial.printf("Client %d connected\n", i);
        break;
      }
    }

    // No room
    WiFiClient reject = server.available();
    reject.stop();
  }

  // Read GPS
  while (GPS.available()) {

    char c = GPS.read();

    // Echo to USB serial
    Serial.write(c);

    line += c;

    if (c == '\n') {

      // Send complete NMEA sentence to all clients
      for (int i = 0; i < 5; i++) {

        if (clients[i] && clients[i].connected()) {

          clients[i].print(line);

          if (clients[i].getWriteError()) {
            clients[i].stop();
          }
        }
      }

      line.clear();

      // Prevent runaway if malformed data
      if (line.length() > 256)
        line.clear();
    }
  }
}
  • xgps to view data
apt install gpsd gpsd-clients
nc ESP-IP 10110
#OR
gpsd tcp://192.168.1.150:10110

#lauch

xgps

ESP 8266 node auto reboot – ESPHome

  • logs
[10:24:37.762][E][api:128]: No clients; rebooting
[10:24:37.806][I][app:264]: Forcing a reboot
[10:24:38.079][W][wifi_esp8266:512]: Disconnected ssid='JioFiber-b44M3' bssid=34:D8:56:21:62:FA reason='Association Leave'\xff\xeaU\xfa[I][logger:032]: Log initialized
[10:24:38.151][E][esp8266:171]: *** CRASH DETECTED ON PREVIOUS BOOT ***
[10:24:38.231][E][esp8266:186]:   Reason: Hardware WDT - Level1Int (exccause=4)
[10:24:38.279][E][esp8266:191]:   PC: 0x40106487
WARNING Decoded 0x40106487: system_get_time
[10:24:38.343][C][safe_mode:189]: Unsuccessful boot attempts: 0
[10:24:38.394][I][app:060]: Running through setup()

This means the ESPHome API decided to reboot because no API client (typically Home Assistant or the ESPHome dashboard) was connected for the configured timeout.

By default, if you’re using the api: component, ESPHome can reboot after a period without an API connection.

  • Remove esphome api or set to 0
api:
  reboot_timeout: 0s

User Namespaces in pods – k8 1.36+

  • Without User Namespaces (old behavior)
Container root (UID 0)= Host root (UID 0)
  • With User Namespaces
Container root (UID 0)
        ↓ mapped to
Host UID 100000+ (unprivileged)

nginx-pod-userspace.yml

apiVersion: v1
kind: Pod
metadata:
  labels:
    run: nginx
  name: nginx
spec:
  hostUsers: true
  containers:
  - image: nginx
    name: nginx

Screen shut off / light off / lid down

Keep Proxmox running normally
Turn off only the laptop screen/backlight
Prevent suspend/sleep on lid close

nano /etc/systemd/logind.conf

#add

HandleLidSwitch=ignore

HandleLidSwitchDocked=ignore
HandleSuspendKey=ignore
HandleHibernateKey=ignore

systemctl restart systemd-logind
  • Turn off the laptop display only
apt update
apt install vbetool
vbetool dpms off
vbetool dpms on

Delete promethes metrics – free disk space

My prometheus is set to hold 10years data but currently my disk is 95% full. So i want to delete some metrics that i never use.

  • First we need to enable admin web api
      containers:
      - args:
        - --config.file=/etc/prometheus/prometheus.yml
        - --storage.tsdb.path=/prometheus
        - --storage.tsdb.retention.time=3650d
        - --web.enable-admin-api
  • Delete node_load15 metrics
curl -X POST http://localhost:9090/api/v1/admin/tsdb/delete_series?match[]=node_load15

curl -X POST -g 'http://localhost:9090/api/v1/admin/tsdb/delete_series?match[]={kubernetes_pod_name!=""}'


curl -X POST http://localhost:9090/api/v1/admin/tsdb/clean_tombstones

raspberry pi boot long time – no boot / reboot issue fixed

I have raspberry pi 4 with raspbian os lite installed and the OS is directly installed on SSD which is connected with USB3.0 with connector USB-to-SATA. Whenever the power outage happens the pi some time boots and sometime it doesn’t and it also takes lots of time to boot 10min+

  • First I checked with below command what services are taking longer time and disabled docker and kubelet rpi-eeprom-update
root@lp-arm-3:~# systemd-analyze blame
1min 36.522s docker.service
     51.427s containerd.service
     50.609s rpi-eeprom-update.service
     50.590s user@1000.service
     50.221s ModemManager.service
     49.702s NetworkManager-wait-online.service
     38.108s apt-daily-upgrade.service
     32.277s dpkg-db-backup.service
      2.558s dev-sda2.device
      1.281s raspi-config.service
       670ms man-db.service
       613ms NetworkManager.service
       583ms keyboard-setup.service
       536ms systemd-logind.service
       512ms systemd-udev-trigger.service
       429ms systemd-journald.service


root@lp-arm-3:~# systemd-analyze
Startup finished in 36.419s (kernel) + 2min 33.375s (userspace) = 3min 9.794s 
multi-user.target reached after 2min 33.318s in userspace.



root@lp-arm-3:~# systemd-analyze critical-chain
The time when unit became active or started is printed after the "@" character.
The time the unit took to start is printed after the "+" character.

multi-user.target @2min 33.318s
└─kubelet.service @1min 6.646s
  └─network-online.target @55.038s
    └─NetworkManager-wait-online.service @5.315s +49.702s
      └─NetworkManager.service @4.687s +613ms
        └─dbus.service @4.552s +97ms
          └─basic.target @4.509s
            └─sockets.target @4.509s
              └─docker.socket @4.485s +23ms
                └─sysinit.target @4.468s
                  └─systemd-timesyncd.service @4.091s +375ms
                    └─systemd-tmpfiles-setup.service @3.805s +208ms
                      └─local-fs.target @3.777s
                        └─run-user-1000.mount @5.576s
                          └─local-fs-pre.target @1.650s
                            └─keyboard-setup.service @1.065s +583ms
                              └─systemd-journald.socket @1.019s
                                └─-.mount @946ms
                                  └─-.slice @946ms
  • This did not fix issue.
  • Main issue was USB SATA driver speed.
  • I enabled permanent logs for boot
journalctl --list-boots
journalctl -b -1

show only error

journalctl -b -1 -p err

Feb 07 20:40:53 lp-arm-3.home kernel: sd 0:0:0:0: [sda] tag#9 uas_eh_abort_handler 0 uas-tag 15 inflight: CMD OUT Feb 07 20:40:53 lp-arm-3.home kernel: sd 0:0:0:0: [sda] tag#9 CDB: opcode=0x2a 2a 00 01 50 21 78 00 00 08 00 Feb 07 20:40:53 lp-arm-3.home kernel: sd 0:0:0:0: [sda] tag#4 uas_eh_abort_handler 0 uas-tag 6 inflight: CMD Feb 07 20:40:53 lp-arm-3.home kernel: sd 0:0:0:0: [sda] tag#4 CDB: opcode=0x35 35 00 00 00 00 00 00 00 00 00 Feb 07 20:40:53 lp-arm-3.home kernel: scsi host0: uas_eh_device_reset_handler start Feb 07 20:40:53 lp-arm-3.home kernel: usb 2-2: reset SuperSpeed USB device number 2 using xhci_hcd Feb 07 20:40:53 lp-arm-3.home kernel: scsi host0: uas_eh_device_reset_handler success Feb 07 20:40:53 lp-arm-3.home kernel: sd 0:0:0:0: [sda] tag#8 UNKNOWN(0x2003) Result: hostbyte=0x07 driverbyte=DRIVER_OK cmd_age=61s Feb 07 20:40:53 lp-arm-3.home kernel: sd 0:0:0:0: [sda] tag#8 CDB: opcode=0x28 28 00 00 5e dc f8 00 00 10 00 Feb 07 20:40:53 lp-arm-3.home kernel: I/O error, dev sda, sector 6216952 op 0x0:(READ) flags 0x80700 phys_seg 2 prio class 2 Feb 07 20:40:53 lp-arm-3.home kernel: sd 0:0:0:0: [sda] tag#2 UNKNOWN(0x2003) Result: hostbyte=0x07 driverbyte=DRIVER_OK cmd_age=61s Feb 07 20:40:53 lp-arm-3.home kernel: sd 0:0:0:0: [sda] tag#2 CDB: opcode=0x28 28 00 02 88 f5 e0 00 00 30 00 Feb 07 20:40:53 lp-arm-3.home kernel: I/O error, dev sda, sector 42530272 op 0x0:(READ) flags 0x80700 phys_seg 6 prio class 2 Feb 07 20:40:53 lp-arm-3.home kernel: sd 0:0:0:0: [sda] tag#1 UNKNOWN(0x2003) Result: hostbyte=0x07 driverbyte=DRIVER_OK cmd_age=61s Feb 07 20:40:53 lp-arm-3.home kernel: sd 0:0:0:0: [sda] tag#1 CDB: opcode=0x28 28 00 00 5e cb c8 00 01 00 00 Feb 07 20:40:53 lp-arm-3.home kernel: I/O error, dev sda, sector 6212552 op 0x0:(READ) flags 0x80700 phys_seg 32 prio class 2 Feb 07 20:40:53 lp-arm-3.home kernel: sd 0:0:0:0: [sda] tag#3 UNKNOWN(0x2003) Result: hostbyte=0x07 driverbyte=DRIVER_OK cmd_age=61s Feb 07 20:40:53 lp-arm-3.home kernel: sd 0:0:0:0: [sda] tag#3 CDB: opcode=0x28 28 00 02 84 ee 68 00 00 50 00 Feb 07 20:40:53 lp-arm-3.home kernel: I/O error, dev sda, sector 42266216 op 0x0:(READ) flags 0x80700 phys_seg 10 prio class 2 Feb 07 20:40:53 lp-arm-3.home kernel: sd 0:0:0:0: [sda] tag#6 UNKNOWN(0x2003) Result: hostbyte=0x07 driverbyte=DRIVER_OK cmd_age=55s Feb 07 20:40:53 lp-arm-3.home kernel: sd 0:0:0:0: [sda] tag#6 CDB: opcode=0x28 28 00 02 80 6e 38 00 00 90 00 Feb 07 20:40:53 lp-arm-3.home kernel: I/O error, dev sda, sector 41971256 op 0x0:(READ) flags 0x80700 phys_seg 18 prio class 2 Feb 07 20:40:53 lp-arm-3.home kernel: sd 0:0:0:0: [sda] tag#7 UNKNOWN(0x2003) Result: hostbyte=0x07 driverbyte=DRIVER_OK cmd_age=49s Feb 07 20:40:53 lp-arm-3.home kernel: sd 0:0:0:0: [sda] tag#7 CDB: opcode=0x28 28 00 02 80 3c d0 00 00 58 00 Feb 07 20:40:53 lp-arm-3.home kernel: I/O error, dev sda, sector 41958608 op 0x0:(READ) flags 0x80700 phys_seg 11 prio class 2
  • The kernel is resetting the USB
  • Disabled UAS for SSD – fixed the issue
lsusb

#get the USB ID eg 7825:a2a4

vi /boot/firmware/cmdline.txt

append this line at the end

usb-storage.quirks=7825:a2a4:u

reboot

root@lp-arm-3:~# lsusb -t
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M
    |__ Port 2: Dev 2, If 0, Class=Mass Storage, Driver=usb-storage, 5000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M

usb-storage (BOT):

sends one command at a time
waits for completion
has simpler recovery
tolerates retries and delays

Get indoor temperature from your LG AC WIFI

  • Install the pythinqconnect package
 pip3 install git+https://github.com/thinq-connect/pythinqconnect.git --break-system-packages
  • Get PAT token generated
https://connect-pat.lgthinq.com/tokens
  • Get Device id
import asyncio
from aiohttp import ClientSession
# Assuming a library structure like pythinqconnect
from thinqconnect.thinq_api import ThinQApi 

############## Get device ID ###############
async def test_devices_list():
    # Setup your credentials and personal access token (PAT)
    async with ClientSession() as session:
        thinq_api = ThinQApi(
            session=session, 
            access_token='PAT',
            country_code='',  # Example: US, KR, NL
            client_id='your_client_id'
        )
        # Fetch device list
        response = await thinq_api.async_get_device_list()
        print("device_list : %s", response)

# Run the async function
asyncio.run(test_devices_list())
  • Get temp
async def get_indoor_temperature_c():
    async with ClientSession() as session:
        api = ThinQApi(
            session=session,
            access_token="PAT",
            country_code="",
            client_id="YOUR_CLIENT_ID"
        )

        status = await api.async_get_device_status(DEVICE_ID)

        temp_c = status["temperature"]["currentTemperature"]

        print(temp_c)
        return temp_c

asyncio.run(get_indoor_temperature_c())
@home:~/Downloads/c$ python3 lg.py 
29.5

https://smartsolution.developer.lge.com/en/apiManage/device_profile?s=1734593490507#tag/overview

https://github.com/thinq-connect/pythinqconnect/tree/main