BearMax 3D PRINTER: 2017

2017년 11월 8일 수요일

Raspberry Pi B+ rtl8188eu 사용.

raspberry pi B+ 에 wifi usb dongle rtl8188eu 를 사용하는 환경에서 wifi가 접속되지 않는 상태

lsusb 에서도 잘 잡히고
root@dpi:/home/pi# lsusb
Bus 001 Device 007: ID 15d9:0a4e Trust International B.V.
Bus 001 Device 006: ID 413c:2106 Dell Computer Corp. Dell QuietKey Keyboard
Bus 001 Device 005: ID 1a40:0101 Terminus Technology Inc. Hub
Bus 001 Device 004: ID 0bda:8179 Realtek Semiconductor Corp. RTL8188EUS 802.11n Wireless Network Adapter
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp. SMC9512/9514 USB Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

lsmod 에서도 잘 잡힌다.
root@dpi:/home/pi# lsmod
Module Size Used by
evdev 11746 0
r8188eu 425640 0
cfg80211 527100 0 r8188eu <<<<< used 가 0 임.
rfkill 21373 3 cfg80211
snd_bcm2835 23131 0
snd_pcm 97825 1 snd_bcm2835
snd_timer 22706 1 snd_pcm
snd 68784 3 snd_timer,snd_bcm2835,snd_pcm
bcm2835_gpiomem 3791 0
uio_pdrv_genirq 3718 0
uio 10166 1 uio_pdrv_genirq
fixed 3029 0
ip_tables 12512 0
x_tables 20921 1 ip_tables
ipv6 384613 0

blacklist 등록도 하고
root@dpi:/home/pi# cat /etc/modprobe.d/8188eu.conf
# r8188eu is staging, 8188eu is off-kernel
#blacklist brcmfmac
blacklist rtl8188eu
options rtl8188eu rtw_power_mgnt=0 rtw_enusbss=0

여러 방법을 써 봤지만, 아래의 방법이 최후의 성공 방법.

root@dpi:/home/pi# cd /lib/systemd/system/

root@dpi:/home/pi# cp wpa_supplicant@.service wpa_supplicant_wlan0.service

root@dpi:/home/pi# systemctl enable wpa_supplicant_wlan0.service

root@dpi:/home/pi# reboot

재부팅 후

[ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch.
[ OK ] Started Hostname Service.
[ OK ] Found device RTL8188EUS 802.11n Wireless Network Adapter.
[ OK ] Started ifup for wlan0.
[ OK ] Started dhcpcd on all interfaces.
[ OK ] Reached target Network.
Starting Permit User Sessions...
Starting The Apache HTTP Server...
Starting OpenBSD Secure Shell server...
Starting /etc/rc.local Compatibility...
[ OK ] Started Permit User Sessions.
My IP address is 192.192.1.19 <<< IP주소를 가져왔다.
[ OK ] Started /etc/rc.local Compatibility.
Starting Terminate Plymouth Boot Screen...

Starting Hold until boot process finishes up...

root@dpi:/home/pi# lsmod
Module Size Used by
evdev 11746 0
r8188eu 425640 0
cfg80211 527100 1 r8188eu <<<<< used 가 1 임.
rfkill 21373 3 cfg80211
snd_bcm2835 23131 0
snd_pcm 97825 1 snd_bcm2835
snd_timer 22706 1 snd_pcm
snd 68784 3 snd_timer,snd_bcm2835,snd_pcm
bcm2835_gpiomem 3791 0
uio_pdrv_genirq 3718 0
uio 10166 1 uio_pdrv_genirq
fixed 3029 0
ip_tables 12512 0
x_tables 20921 1 ip_tables

ipv6 384613 0

2017년 10월 27일 금요일

Raspberry Pi WiFi power mode 변경

WiFi USB 동글을 사용중 Power saving 모드 때문에 일정시간이 지나면 WiFi 통신이 되지 않는경우.
Power saving 모드를 비활성화 시켜 통신이 지속되도록 만드는 절차.

USB dongle : RealTek 8188CUS

root@doorpi:/etc/network# lsusb
Bus 001 Device 004: ID 0bda:8176 Realtek Semiconductor Corp. RTL8188CUS 802.11n WLAN Adapter
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp. SMC9512/9514 USB Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

root@doorpi:/home/pi# cat /sys/module/8192cu/parameters/rtw_power_mgnt

1은 Power saving 모드가 활성화 된 상태, 0으로 바꾼다.

root@doorpi:/home/pi# vi /etc/modprobe.d/brtl8192cu.conf

options 8192cu rtw_power_mgnt=0 rtw_enusbss=0

root@doorpi:/home/pi# reboot

root@doorpi:/home/pi# cat /sys/module/8192cu/parameters/rtw_power_mgnt

2017년 2월 6일 월요일

rabbitmq esp8266 mqtt -> amqp

ESP8266 을 사용하여 수집된 데이터를 rabbitmq 에 전송하고,
AQMP 를 사용하여 데이터를 수집하는 코드 샘플.

receive.py

#!/usr/bin/env python
import pika

credentials = pika.PlainCredentials('test', 'testpass')

parameters = pika.ConnectionParameters('192.168.1.28',
5672,
'/energy',
credentials)

connection = pika.BlockingConnection(parameters)
channel = connection.channel()

channel.exchange_declare(exchange='amq.topic', type='topic', durable=True)

result=channel.queue_declare(exclusive=True)

queue_name=result.method.queue

channel.queue_bind(exchange='amq.topic',
queue=queue_name,
routing_key="outTopic")

def callback(ch, method, properties, body):
print(" [x] Received %r" % body)

channel.basic_consume(callback,
queue=queue_name,
no_ack=True)

print(' [*] Waiting for messages. To exit press CTRL+C')
channel.start_consuming()

ESP12-MQTT-example01.ino

Basic ESP8266 MQTT example

This sketch demonstrates the capabilities of the pubsub library in combination

with the ESP8266 board/library.

It connects to an MQTT server then:

- publishes "hello world" to the topic "outTopic" every two seconds

- subscribes to the topic "inTopic", printing out any messages

it receives. NB - it assumes the received payloads are strings not binary

- If the first character of the topic "inTopic" is an 1, switch ON the ESP Led,

else switch it off

It will reconnect to the server if the connection is lost using a blocking

reconnect function. See the 'mqtt_reconnect_nonblocking' example for how to

achieve the same result without blocking the main loop.

To install the ESP8266 board, (using Arduino 1.6.4+):

- Add the following 3rd party board manager under "File -> Preferences -> Additional Boards Manager URLs":

http://arduino.esp8266.com/stable/package_esp8266com_index.json

- Open the "Tools -> Board -> Board Manager" and click install for the ESP8266"

- Select your ESP8266 in "Tools -> Board"

#include <ESP8266WiFi.h>

#include <PubSubClient.h>

// Update these with values suitable for your network.

const char* ssid = "YOUR_SSID";

const char* password = "AP_PASSWORD";

const char* mqtt_server = "192.168.1.28";

WiFiClient espClient;

PubSubClient client(espClient);

long lastMsg = 0;

char msg[50];

int value = 0;

void setup() {

pinMode(BUILTIN_LED, OUTPUT); // Initialize the BUILTIN_LED pin as an output

Serial.begin(115200);

setup_wifi();

client.setServer(mqtt_server, 1883);

client.setCallback(callback);

}

void setup_wifi() {

delay(10);

// We start by connecting to a WiFi network

Serial.println();

Serial.print("Connecting to ");

Serial.println(ssid);

WiFi.begin(ssid, password);

while (WiFi.status() != WL_CONNECTED) {

delay(500);

Serial.print(".");

}

Serial.println("");

Serial.println("WiFi connected");

Serial.println("IP address: ");

Serial.println(WiFi.localIP());

}

void callback(char* topic, byte* payload, unsigned int length) {

Serial.print("Message arrived [");

Serial.print(topic);

Serial.print("] ");

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

Serial.print((char)payload[i]);

}

Serial.println();

// Switch on the LED if an 1 was received as first character

if ((char)payload[0] == '1') {

digitalWrite(BUILTIN_LED, LOW); // Turn the LED on (Note that LOW is the voltage level

// but actually the LED is on; this is because

// it is acive low on the ESP-01)

} else {

digitalWrite(BUILTIN_LED, HIGH); // Turn the LED off by making the voltage HIGH

}

void reconnect() {

// Loop until we're reconnected

while (!client.connected()) {

Serial.print("Attempting MQTT connection...");

// Attempt to connect

if (client.connect("ESP8266Client", "test", "testpass")) {

Serial.println("connected");

// Once connected, publish an announcement...

client.publish("outTopic", "hello world");

// ... and resubscribe

client.subscribe("inTopic");

} else {

Serial.print("failed, rc=");

Serial.print(client.state());

Serial.println(" try again in 5 seconds");

// Wait 5 seconds before retrying

delay(5000);

}

void loop() {

if (!client.connected()) {

reconnect();

}

client.loop();

long now = millis();

if (now - lastMsg > 2000) {

lastMsg = now;

++value;

snprintf (msg, 75, "hello world #%ld", value);

Serial.print("Publish message: ");

Serial.println(msg);

client.publish("outTopic", msg);

}

2017년 2월 5일 일요일

rabbitmq ipv4 서비스

rabbitmq 서비스 재시작.

pi@rabbit-pi:/etc/rabbitmq $ sudo systemctl restart rabbitmq-server

최초 실행 시 rabbitmq 는 ipv6 에서 5672 서비스 가능.

pi@rabbit-pi:~/test $ netstat -an|more

Active Internet connections (servers and established)

Proto Recv-Q Send-Q Local Address Foreign Address State

tcp 0 0 0.0.0.0:25672 0.0.0.0:* LISTEN

tcp 0 0 0.0.0.0:4369 0.0.0.0:* LISTEN

tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN

tcp 0 0 0.0.0.0:15672 0.0.0.0:* LISTEN

tcp 0 0 127.0.0.1:6010 0.0.0.0:* LISTEN

tcp 0 0 127.0.0.1:6011 0.0.0.0:* LISTEN

tcp 0 0 192.168.1.28:22 192.168.1.13:42954 ESTABLISHED

tcp 0 0 192.168.1.28:22 192.168.1.13:43512 ESTABLISHED

tcp 0 0 192.168.1.28:22 192.168.1.13:43500 ESTABLISHED

tcp 0 0 127.0.0.1:40659 127.0.0.1:4369 ESTABLISHED

tcp 0 0 127.0.0.1:4369 127.0.0.1:40659 ESTABLISHED

tcp 0 0 127.0.1.1:4369 127.0.0.1:41022 TIME_WAIT

tcp6 0 0 :::5672 :::* LISTEN

tcp6 0 0 :::22 :::* LISTEN

tcp6 0 0 ::1:6010 :::* LISTEN

tcp6 0 0 ::1:6011 :::* LISTEN

tcp6 0 0 ::1:57068 ::1:5672 ESTABLISHED

tcp6 0 0 ::1:5672 ::1:57068 ESTABLISHED

tcp6 0 0 ::1:57962 ::1:6011 TIME_WAIT

udp 0 0 0.0.0.0:68 0.0.0.0:*

udp 0 0 192.168.1.28:123 0.0.0.0:*

udp 0 0 127.0.0.1:123 0.0.0.0:*

udp 0 0 0.0.0.0:123 0.0.0.0:*

udp 0 0 0.0.0.0:50330 0.0.0.0:*

udp 0 0 0.0.0.0:5353 0.0.0.0:*

udp6 0 0 :::34779 :::*

udp6 0 0 fe80::8aa2:e9e0:b44:123 :::*

udp6 0 0 ::1:123 :::*

udp6 0 0 :::123 :::*

udp6 0 0 :::5353 :::*

raw6 0 0 :::58 :::* 7

ipv4 서비스 하기 위해 /etc/rabbitmq/rabbitmq.config 파일 생성(최초 설치 시 없는파일 이므로 만들어 사용).

pi@rabbit-pi:/etc/rabbitmq $ cat /etc/rabbitmq/rabbitmq.config

[

{rabbit, [

{tcp_listeners, [{"0.0.0.0", 5672},

{"::1", 5672}]}

]}

서비스 restart

pi@rabbit-pi:/etc/rabbitmq $ sudo systemctl restart rabbitmq-server

network 서비스 확인

pi@rabbit-pi:/etc/rabbitmq $ netstat -an|more

Active Internet connections (servers and established)

Proto Recv-Q Send-Q Local Address Foreign Address State

tcp 0 0 0.0.0.0:5672 0.0.0.0:* LISTEN

tcp 0 0 0.0.0.0:25672 0.0.0.0:* LISTEN

tcp 0 0 0.0.0.0:4369 0.0.0.0:* LISTEN

tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN

tcp 0 0 0.0.0.0:15672 0.0.0.0:* LISTEN

tcp 0 0 127.0.0.1:6010 0.0.0.0:* LISTEN

tcp 0 0 127.0.0.1:6011 0.0.0.0:* LISTEN

tcp 0 0 127.0.0.1:43999 127.0.1.1:25672 TIME_WAIT

tcp 0 0 127.0.0.1:4369 127.0.0.1:46258 TIME_WAIT

tcp 0 0 127.0.0.1:33074 127.0.0.1:4369 ESTABLISHED

tcp 0 0 192.168.1.28:22 192.168.1.13:42954 ESTABLISHED

tcp 0 0 127.0.0.1:44711 127.0.0.1:4369 TIME_WAIT

tcp 0 0 127.0.0.1:4369 127.0.0.1:33074 ESTABLISHED