From 5d0deba9dad754223011dd3370dabf33885c645e Mon Sep 17 00:00:00 2001
From: Bogdan Vlaicu <bogdanvlaicu@yahoo.com>
Date: Thu, 2 Apr 2020 17:06:22 -0400
Subject: [PATCH] New meter_reader add-on

---
 meter_reader/.DS_Store   | Bin 0 -> 6148 bytes
 meter_reader/Dockerfile  |  22 +++++++
 meter_reader/README.md   |  28 ++++++++
 meter_reader/config.json |  14 ++++
 meter_reader/icon.png    | Bin 0 -> 8605 bytes
 meter_reader/logo.png    | Bin 0 -> 8605 bytes
 meter_reader/ocr_aws.py  | 135 +++++++++++++++++++++++++++++++++++++++
 meter_reader/run.sh      |   5 ++
 8 files changed, 204 insertions(+)
 create mode 100644 meter_reader/.DS_Store
 create mode 100644 meter_reader/Dockerfile
 create mode 100644 meter_reader/README.md
 create mode 100644 meter_reader/config.json
 create mode 100644 meter_reader/icon.png
 create mode 100644 meter_reader/logo.png
 create mode 100644 meter_reader/ocr_aws.py
 create mode 100644 meter_reader/run.sh

diff --git a/meter_reader/.DS_Store b/meter_reader/.DS_Store
new file mode 100644
index 0000000000000000000000000000000000000000..5008ddfcf53c02e82d7eee2e57c38e5672ef89f6
GIT binary patch
literal 6148
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literal 0
HcmV?d00001

diff --git a/meter_reader/Dockerfile b/meter_reader/Dockerfile
new file mode 100644
index 0000000..7fafa06
--- /dev/null
+++ b/meter_reader/Dockerfile
@@ -0,0 +1,22 @@
+ARG BUILD_FROM
+FROM $BUILD_FROM
+
+# Add env
+ENV LANG C.UTF-8
+
+RUN apk add --no-cache curl
+RUN apk add --no-cache python3
+RUN apk add --no-cache nano
+
+# install .py script dependency
+RUN pip3 install boto3
+RUN pip3 install requests
+RUN pip3 install paho-mqtt
+
+# Copy data for add-on
+COPY ocr_aws.py /
+COPY run.sh /
+
+RUN chmod a+x /run.sh
+
+CMD [ "/run.sh" ]
diff --git a/meter_reader/README.md b/meter_reader/README.md
new file mode 100644
index 0000000..d77a048
--- /dev/null
+++ b/meter_reader/README.md
@@ -0,0 +1,28 @@
+# Meter Reader
+
+Put a webcam in front of your utility meter and AWS Rekognition sends the reading over MQTT to a MQTT server of your choice.
+
+note: if you restart the addon you will need to update the baseline value.
+
+
+## Config
+
+upd_interval: value in seconds to be used as interval between data refreshes.
+
+url: where to find the picture of your meter (webcam) - it will be stored temporarily in folder /config/www
+
+user: basic authentication for cam
+
+password: password to obtain webcam picture
+
+baseline: current reading of your meter
+
+under: max you expect it to go down during an update interval (where I live solar panels allow meters to run backwards)
+
+over: max you expect it to go up during an update interval
+
+aws_access_key_id, aws_secret_access_key, region: see link on how to set up an AWS account. Did not really see how to get your region, I use "us-east-2" (https://docs.aws.amazon.com/rekognition/latest/dg/setting-up.html)
+
+mqtt_host, mqtt_port, mqtt_user, mqtt_pwd: find and get access to your MQTT server
+
+mqtt_topic: topic on which meter reading gets published
diff --git a/meter_reader/config.json b/meter_reader/config.json
new file mode 100644
index 0000000..082b091
--- /dev/null
+++ b/meter_reader/config.json
@@ -0,0 +1,14 @@
+{
+    "name": "Meter reader",
+    "version": "0.1.13",
+    "slug": "meterreader",
+	"homeassistant_api": "no",
+    "description": "Put a webcam in front of your utility meter and let AWS Rekognition push the reading over mqtt",
+	"url": "https://github.com/bvlaicu/home-assistant-addons/tree/master/meter_reader",
+    "startup": "application",
+	"boot": "auto",
+	"arch": ["aarch64", "amd64", "armv7", "i386"],
+    "options": {"upd_interval":1800,"url": "127.0.0.1", "user": null, "password": null, "baseline": 1, "under": 1, "over": 1, "aws_access_key_id": null, "aws_secret_access_key": null, "region": null, "mqtt_host":"127.0.0.1", "mqtt_port":1883, "mqtt_user":"mqtt", "mqtt_pwd":"mqtt_pwd","mqtt_topic":"home/meter"},
+    "schema": {"upd_interval": "int", "url":"str", "user":"str", "password":"str", "baseline":"int", "under":"int", "over":"int", "aws_access_key_id": "str", "aws_secret_access_key": "str", "region": "str", "mqtt_host":"str", "mqtt_port":"int", "mqtt_user":"str", "mqtt_pwd":"str","mqtt_topic":"str"},
+    "map": ["config:rw"]
+}
\ No newline at end of file
diff --git a/meter_reader/icon.png b/meter_reader/icon.png
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diff --git a/meter_reader/ocr_aws.py b/meter_reader/ocr_aws.py
new file mode 100644
index 0000000..17794df
--- /dev/null
+++ b/meter_reader/ocr_aws.py
@@ -0,0 +1,135 @@
+import boto3
+import paho.mqtt.client as mqtt
+import requests
+import json
+import time
+import os
+import re
+import sys
+
+config_json = json.loads(open("/data/options.json").read())
+
+path = "/root/.aws"
+reading = ""
+
+try:
+    os.mkdir(path)
+except OSError:
+    print("Creation of the directory %s failed" % path)
+else:
+    print("Successfully created the directory %s " % path)
+
+f = open("/root/.aws/credentials", "w")
+f.write("[default]")
+f.write("\n")
+f.write("aws_access_key_id = " + config_json["aws_access_key_id"])
+f.write("\n")
+f.write("aws_secret_access_key = " + config_json["aws_secret_access_key"])
+f.close()
+f = open("/root/.aws/config", "w")
+f.write("[default]")
+f.write("\n")
+f.write("region = " + config_json["region"])
+f.close()
+
+baseline = int(config_json["baseline"])
+base_low = baseline - int(config_json["under"])
+base_up = baseline + int(config_json["over"])
+
+client = boto3.client('rekognition')
+
+
+def processor(base_low, baseline, base_up):
+    file = "/config/www/meter.jpg"
+    data_str = reader(file)
+    response = client.detect_text(Image={'Bytes': data_str})
+    print(response)
+    print("")
+    found = (response['TextDetections'])
+    reading = ""
+    for item in found:
+        print("Tekst:", item['DetectedText'])
+        print("Type:", item['Type'])
+        print("Confidence", item['Confidence'])
+        print("Id", item['Id'])
+        if item['Type'] != 'LINE':
+            print("ParentId:", item['ParentId'])
+        if (item['Type'] == 'WORD') or (item['Type'] == 'LINE'):
+            print("value conversion")
+            temp = item['DetectedText']
+            print("x", temp, "x")
+            temp = re.sub("[^0-9]", "", temp)
+            print("x", temp, "x")
+            nw = 0
+            try:
+                nw = int(temp)
+            except Exception:
+                print("Conversion failed")
+                pass
+            print("Nw: ", nw)
+            if (base_low <= nw and nw <= base_up):
+                print("erg waarschijnlijk juist:")
+                reading = temp
+                print(temp)
+                print(base_low, nw, base_up)
+        print("-----------")
+    return reading
+
+
+def reader(file):
+    with open(file, "rb") as image_file:
+        encoded_string = image_file.read()
+        return encoded_string
+
+
+def takereading():
+    # download the url contents in binary format
+    r = requests.get(config_json["url"], auth=(config_json["user"], config_json["password"]))
+    # open method to open a file on your system and write the contents
+    with open("/config/www/meter.jpg", "wb") as code:
+        code.write(r.content)
+    print("File downloaded")
+
+
+def publishMQTT(reading):
+    mqttc = mqtt.Client("meter_reader")
+    mqttc.username_pw_set(username=config_json["mqtt_user"], password=config_json["mqtt_pwd"])
+    mqttc.connect(config_json["mqtt_host"], int(config_json["mqtt_port"]))
+    mqttc.publish(config_json["mqtt_topic"], reading, retain=True)
+    mqttc.disconnect()
+
+
+def publishhiloMQTT(low, high):
+    mqttc = mqtt.Client("meter_reader")
+    mqttc.username_pw_set(username=config_json["mqtt_user"], password=config_json["mqtt_pwd"])
+    mqttc.connect(config_json["mqtt_host"], int(config_json["mqtt_port"]))
+    mqttc.publish("home/band/low", str(low), retain=True)
+    mqttc.publish("home/band/high", str(high), retain=True)
+    mqttc.disconnect()
+
+
+if __name__ == '__main__':
+    baseline = int(config_json["baseline"])
+    base_low = baseline - int(config_json["under"])
+    base_up = baseline + int(config_json["over"])
+    while True:
+        print("Start")
+        try:
+            takereading()
+            print("foto action finished")
+            reading = processor(base_low, baseline, base_up)
+            if reading != "":
+                print("Reading = ok = ", reading)
+                baseline = int(reading)
+                base_low = baseline - int(config_json["under"])
+                base_up = baseline + int(config_json["over"])
+                publishMQTT(reading)
+                publishhiloMQTT(base_low, base_up)
+            else:
+                base_low = base_low - int(config_json["under"])
+                base_up = base_up + int(config_json["over"])
+                publishhiloMQTT(base_low, base_up)
+        except Exception:
+            print("Unexpected error:", sys.exc_info())
+            print("OCR failed. Will try again later.")
+        time.sleep(int(config_json["upd_interval"]))
diff --git a/meter_reader/run.sh b/meter_reader/run.sh
new file mode 100644
index 0000000..1ed314c
--- /dev/null
+++ b/meter_reader/run.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+set -e
+
+python3 ocr_aws.py
+