Differences

This shows you the differences between two versions of the page.

--- projects:neopixel-bandwidth-room-light [2017-10-14 20:34]
mrweedwood [Flash]
+++ projects:neopixel-bandwidth-room-light [2017-10-15 08:44]
trinitor [SNMP Example]
@@ Line 47: / Line 47: @@
 ===== Programm =====
 <code>
-Todo
+#include <ESP8266WiFi.h>
+#include <WiFiUdp.h>
+#include <ArduinoJson.h>
+#include <Adafruit_NeoPixel.h>
+#ifdef __AVR__
+  #include <avr/power.h>
+#endif
+///////////////////////////// config /////////////////////////////
+// Network
+const char*  ssid         = "your_wifi_ssid";
+const char*  password     = "our_wifi_psk";
+unsigned int localUdpPort = 2342;
+char incomingPacket[255];  // buffer for incoming packets
+char replyPacket[] = "message received";  // a reply string to send back
+// neopixel
+const int LEDPIN          =   15;
+const int NUMPIXELS       =  300;
+int displayrefresh        =   10;
+//////////////////////////////////////////////////////////////////
+// usage examples:
+// echo "{red:0,green:100,blue:0}" | nc -w 1 -u 192.168.x.x 2342
+// echo "{red:32,green:32,blue:0,all:1}" | nc -w 1 -u 192.168.x.x 2342
+// echo "{clearall:1}" | nc -w 1 -u 192.168.x.x 2342
+WiFiUDP Udp;
+Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, LEDPIN, NEO_GRB + NEO_KHZ800);
+void setup()
+{
+  Serial.begin(115200);
+  Serial.println();
+  Serial.printf("Connecting to %s ", ssid);
+  WiFi.begin(ssid, password);
+  while (WiFi.status() != WL_CONNECTED)
+  {
+    delay(500);
+    Serial.print(".");
+  }
+  Serial.println(" connected");
+  Udp.begin(localUdpPort);
+  Serial.printf("Now listening at IP %s, UDP port %d\n", WiFi.localIP().toString().c_str(), localUdpPort);
+  pixels.begin();
+  pixels.show();
+}
+void loop()
+{
+  int red      = -1;
+  int green    = -1;
+  int blue     = -1;
+  int refresh  =  0;
+  int all      =  0;
+  int clearall =  0;
+  int packetSize = Udp.parsePacket();
+  if (packetSize)
+  {
+//    Serial.println("Read Packet");
+    // receive incoming UDP packets
+//    Serial.printf("Received %d bytes from %s, port %d\n", packetSize, Udp.remoteIP().toString().c_str(), Udp.remotePort());
+    int len = Udp.read(incomingPacket, 255);
+    if (len > 0)
+    {
+      incomingPacket[len] = 0;
+//      Serial.printf("UDP packet contents: %s", incomingPacket);
+//      Serial.println("Parse Packet");
+      StaticJsonBuffer<200> jsonBuffer;
+      JsonObject& json = jsonBuffer.parseObject(incomingPacket);
+      if (!json.success())
+      {
+        Serial.println("parseObject() failed");
+      } else {
+//        for (JsonObject::iterator it=json.begin(); it!=json.end(); ++it)
+//        {
+//          Serial.println(it->key);
+//          Serial.println(it->value.asString());
+//        }
+        red      = json["red"];
+        green    = json["green"];
+        blue     = json["blue"];
+        refresh  = json["refresh"];
+        all      = json["all"];
+        clearall = json["clearall"];
+      }
+    }
+    // send back a reply, to the IP address and port we got the packet from
+//    Serial.println("send UDP response");
+//    Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());
+//    Udp.write(replyPacket);
+//    Udp.endPacket();
+  }
+  // new refresh rate received
+  if (refresh > 0) {
+    Serial.println("new refresh rate received");
+    displayrefresh = refresh;
+  }
+  // set all pixel to black if clearall was set to 1
+  if(all == 1) {
+//    Serial.println("set all pixels");
+    for(int i=0; i<NUMPIXELS; i++) {
+      pixels.setPixelColor(i, pixels.Color(red,green,blue));
+    }
+  }
+  // set all pixel to black if clearall was set to 1
+  if(clearall == 1) {
+//    Serial.println("clear all received");
+    for(int i=0; i<NUMPIXELS; i++) {
+      pixels.setPixelColor(i, pixels.Color(0,0,0));
+    }
+  }
+  //shift pixels
+  for(int i=NUMPIXELS; i>=0; i--) {
+    uint32_t color = pixels.getPixelColor(i);
+    pixels.setPixelColor(i+1, color);
+  }
+  //set color of Pixel 0
+  // new color proviced color changed?
+  if (red >=0 || green >=0 || blue >=0) {
+    //read current color
+    uint32_t CurrentColor = pixels.getPixelColor(1);
+    uint8_t  CurrentRed   = CurrentColor >> 16;
+    uint8_t  CurrentGreen = CurrentColor >> 8;
+    uint8_t  CurrentBlue  = CurrentColor;
+    //if new color < 0 reuse the old color
+    if (red   < 0) {red   = CurrentRed;}
+    if (green < 0) {green = CurrentGreen;}
+    if (blue  < 0) {blue  = CurrentBlue;}
+//    Serial.printf("New color LED 0 -> red: %i, green: %i, blue: %i", red, green, blue);
+    pixels.setPixelColor(0, pixels.Color(red,green,blue));
+  } else {
+//    Serial.printf("no new color");
+    uint32_t color = pixels.getPixelColor(1);
+    pixels.setPixelColor(0, color);
+  }
+  pixels.show();
+  delay(displayrefresh);
+}
 </code>
@@ Line 67: / Line 221: @@
 http://esp8266.github.io/Arduino/versions/2.0.0/doc/ota_updates/ota_updates.html
-===== Test =====
+===== LED Test =====
 <code>
 #!/bin/bash
 IP=192.168.x.x
 PORT=2342
-for i in 16 48 96 256 128 64 32 16 1
+SLEEP=0.1
-do
-   echo led intensity: $i
+while : ; do
-   echo "{red:$i,green:1,blue:1}"   | nc -w 0 -u $IP $PORT ; sleep 1
+for i in $(seq 32 -4 0); do
-   echo "{red:1,green:$i,blue:1}"   | nc -w 0 -u $IP $PORT ; sleep 1
+     echo Led intensity: $i
-   echo "{red:1,green:1,blue:$i}"   | nc -w 0 -u $IP $PORT ; sleep 1
+     echo "{red:$i,green:0,blue:0}" | nc -w 0 -u $IP $PORT ; sleep $SLEEP
-   echo "{red:$i,green:$i,blue:$i}" | nc -w 0 -u $IP $PORT ; sleep 1
+  done
+  sleep 1
+for i in $(seq 32 -4 0); do
+     echo Led intensity: $i
+     echo "{red:0,green:$i,blue:0}" | nc -w 0 -u $IP $PORT ; sleep $SLEEP
+  done
+  sleep 1
+for i in $(seq 32 -4 0); do
+     echo Led intensity: $i
+     echo "{red:0,green:0,blue:$i}" | nc -w 0 -u $IP $PORT ; sleep $SLEEP
+  done
+  sleep 1
 done
 </code>
-===== SNMP Example ======
+===== snmp2neopixel.sh ======
 <code>
-Todo
+#!/bin/bash
+GATEWAYIP=192.168.x.1    #Your gateway
+SNMPCOMMUNITY=public     #snmp read community string
+INTNUMBER=1              #Interface number in SNMP; snmpwalk -v2c -c readcommstring <IP> | grep IF-MIB::ifName
+MESASURETIME=1           #Time in seconds between messurment
+INBOUNDBANDWIDTH=300000  #Max Interface bandwidth
+OUTBOUNDBANDWIDTH=100000 #Max Interface bandwidth
+MAXBRIGHTNESS=32         #NeoPixel brightness (max value = 255)
+NEOPIXELIP=192.168.x.10  #IP of your ESP8266
+NEOPIXELPORT=2342        #UDP port of your ESP8266
+while true; do
+  TIME=$(date +%s)
+  OUT=$(snmpget -v2c -c $SNMPCOMMUNITY $GATEWAYIP ifOutOctets.$INTNUMBER | awk '{print $4}')
+  IN=$(snmpget -v2c -c $SNMPCOMMUNITY $GATEWAYIP ifInOctets.$INTNUMBER | awk '{print $4}')
+  if [ -z "$OUT" ] || [ -z "$IN" ]; then
+     msg="Unable to retrieve SNMP info."
+     exit 2
+  else
+     sleep $MESASURETIME
+     TIME2=$(date +%s)
+     OUT2=$(snmpget -v2c -c $SNMPCOMMUNITY $GATEWAYIP ifOutOctets.$INTNUMBER | awk '{print $4}')
+     IN2=$(snmpget -v2c -c $SNMPCOMMUNITY $GATEWAYIP ifInOctets.$INTNUMBER | awk '{print $4}')
+     if [ "$OUT2" -gt "$OUT" ] || [ "$IN2" -gt "$IN" ] ; then
+       if [ "$TIME2" == "$TIME" ]; then
+         TIME=1
+       fi
+       DELTAOUT=$(echo "$OUT2-$OUT" | bc)
+       DELTAIN=$(echo "$IN2-$IN" | bc)
+       DELTATIME=$(echo "$TIME2-$TIME" | bc)
+       INPUTBW=$(echo "$DELTAIN/$DELTATIME/1024" | bc)
+       OUTPUTBW=$(echo "$DELTAOUT/$DELTATIME/1024" | bc)
+       echo Inbound: $INPUTBW"KB/s"
+       echo Outbound: $OUTPUTBW"KB/s"
+       INPUTPERCENT=$(echo "$DELTAIN*8/$DELTATIME/$INBOUNDBANDWIDTH" | bc)
+       OUTPUTPERCENT=$(echo "$DELTAOUT*8/$DELTATIME/$OUTBOUNDBANDWIDTH" | bc)
+       echo Inbound %: $INPUTPERCENT"%"
+       echo Outbound %: $OUTPUTPERCENT"%"
+       RED=$(echo "$MAXBRIGHTNESS*$OUTPUTPERCENT/100" | bc)
+       GREEN=$(echo "$MAXBRIGHTNESS*$INPUTPERCENT/100" | bc)
+       echo "{red:$RED,green:$GREEN}"
+       echo "{red:$RED,green:$GREEN}" | nc -w 0 -u $NEOPIXELIP $NEOPIXELPORT
+     else
+      echo "no change"
+    fi
+  fi
+done
 </code>

User Tools

Site Tools

Differences

Page Tools