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OVMS3-idf/examples/protocols/esp_local_ctrl/scripts/esp_local_ctrl.py
Anurag Kar b75f8b1b20 ESP Local Control Feature Added 
List of changes:
* New component esp_local_ctrl added
* Example added under examples/protocols/esp_local_ctrl
* Documentation added under protocols/esp_local_ctrl
* Demo client side app esp_local_ctrl.py added under examples/protocols/esp_local_ctrl/scripts
* protocomm_ble : protocomm_ble_config_t given struct name for allowing forward declaration
* esp_prov/transport_softap renamed to transport_http
* transport_http module supports verification of server certificate
* transport_http module performs name resolution before connection
2019-07-03 21:31:04 +05:30

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#!/usr/bin/env python
#
# Copyright 2018 Espressif Systems (Shanghai) PTE LTD
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
from __future__ import print_function
from future.utils import tobytes
from builtins import input
import os
import sys
import struct
import argparse
import proto
try:
import esp_prov
except ImportError:
idf_path = os.environ['IDF_PATH']
sys.path.insert(1, idf_path + "/tools/esp_prov")
import esp_prov
# Set this to true to allow exceptions to be thrown
config_throw_except = False
# Property types enum
PROP_TYPE_TIMESTAMP = 0
PROP_TYPE_INT32 = 1
PROP_TYPE_BOOLEAN = 2
PROP_TYPE_STRING = 3
# Property flags enum
PROP_FLAG_READONLY = (1 << 0)
def prop_typestr(prop):
if prop["type"] == PROP_TYPE_TIMESTAMP:
return "TIME(us)"
elif prop["type"] == PROP_TYPE_INT32:
return "INT32"
elif prop["type"] == PROP_TYPE_BOOLEAN:
return "BOOLEAN"
elif prop["type"] == PROP_TYPE_STRING:
return "STRING"
return "UNKNOWN"
def encode_prop_value(prop, value):
try:
if prop["type"] == PROP_TYPE_TIMESTAMP:
return struct.pack('q', value)
elif prop["type"] == PROP_TYPE_INT32:
return struct.pack('i', value)
elif prop["type"] == PROP_TYPE_BOOLEAN:
return struct.pack('?', value)
elif prop["type"] == PROP_TYPE_STRING:
return tobytes(value)
return value
except struct.error as e:
print(e)
return None
def decode_prop_value(prop, value):
try:
if prop["type"] == PROP_TYPE_TIMESTAMP:
return struct.unpack('q', value)[0]
elif prop["type"] == PROP_TYPE_INT32:
return struct.unpack('i', value)[0]
elif prop["type"] == PROP_TYPE_BOOLEAN:
return struct.unpack('?', value)[0]
elif prop["type"] == PROP_TYPE_STRING:
return value.decode('latin-1')
return value
except struct.error as e:
print(e)
return None
def str_to_prop_value(prop, strval):
try:
if prop["type"] == PROP_TYPE_TIMESTAMP:
return int(strval)
elif prop["type"] == PROP_TYPE_INT32:
return int(strval)
elif prop["type"] == PROP_TYPE_BOOLEAN:
return bool(strval)
elif prop["type"] == PROP_TYPE_STRING:
return strval
return strval
except ValueError as e:
print(e)
return None
def prop_is_readonly(prop):
return (prop["flags"] & PROP_FLAG_READONLY) is not 0
def on_except(err):
if config_throw_except:
raise RuntimeError(err)
else:
print(err)
def get_transport(sel_transport, service_name):
try:
tp = None
if (sel_transport == 'http'):
example_path = os.environ['IDF_PATH'] + "/examples/protocols/esp_local_ctrl"
cert_path = example_path + "/main/certs/rootCA.pem"
tp = esp_prov.transport.Transport_HTTP(service_name, cert_path)
elif (sel_transport == 'ble'):
tp = esp_prov.transport.Transport_BLE(
devname=service_name, service_uuid='0000ffff-0000-1000-8000-00805f9b34fb',
nu_lookup={'esp_local_ctrl/version': '0001',
'esp_local_ctrl/session': '0002',
'esp_local_ctrl/control': '0003'}
)
return tp
except RuntimeError as e:
on_except(e)
return None
def version_match(tp, expected, verbose=False):
try:
response = tp.send_data('esp_local_ctrl/version', expected)
return (response.lower() == expected.lower())
except Exception as e:
on_except(e)
return None
def get_all_property_values(tp):
try:
props = []
message = proto.get_prop_count_request()
response = tp.send_data('esp_local_ctrl/control', message)
count = proto.get_prop_count_response(response)
if count == 0:
raise RuntimeError("No properties found!")
indices = [i for i in range(count)]
message = proto.get_prop_vals_request(indices)
response = tp.send_data('esp_local_ctrl/control', message)
props = proto.get_prop_vals_response(response)
if len(props) != count:
raise RuntimeError("Incorrect count of properties!")
for p in props:
p["value"] = decode_prop_value(p, p["value"])
return props
except RuntimeError as e:
on_except(e)
return []
def set_property_values(tp, props, indices, values, check_readonly=False):
try:
if check_readonly:
for index in indices:
if prop_is_readonly(props[index]):
raise RuntimeError("Cannot set value of Read-Only property")
message = proto.set_prop_vals_request(indices, values)
response = tp.send_data('esp_local_ctrl/control', message)
return proto.set_prop_vals_response(response)
except RuntimeError as e:
on_except(e)
return False
if __name__ == '__main__':
parser = argparse.ArgumentParser(add_help=False)
parser = argparse.ArgumentParser(description="Control an ESP32 running esp_local_ctrl service")
parser.add_argument("--version", dest='version', type=str,
help="Protocol version", default='')
parser.add_argument("--transport", dest='transport', type=str,
help="transport i.e http or ble", default='http')
parser.add_argument("--name", dest='service_name', type=str,
help="BLE Device Name / HTTP Server hostname or IP", default='')
parser.add_argument("-v", "--verbose", dest='verbose', help="increase output verbosity", action="store_true")
args = parser.parse_args()
if args.version != '':
print("==== Esp_Ctrl Version: " + args.version + " ====")
if args.service_name == '':
args.service_name = 'my_esp_ctrl_device'
if args.transport == 'http':
args.service_name += '.local'
obj_transport = get_transport(args.transport, args.service_name)
if obj_transport is None:
print("---- Invalid transport ----")
exit(1)
if args.version != '':
print("\n==== Verifying protocol version ====")
if not version_match(obj_transport, args.version, args.verbose):
print("---- Error in protocol version matching ----")
exit(2)
print("==== Verified protocol version successfully ====")
while True:
properties = get_all_property_values(obj_transport)
if len(properties) == 0:
print("---- Error in reading property values ----")
exit(4)
print("\n==== Available Properties ====")
print("{0: >4} {1: <16} {2: <10} {3: <16} {4: <16}".format(
"S.N.", "Name", "Type", "Flags", "Value"))
for i in range(len(properties)):
print("[{0: >2}] {1: <16} {2: <10} {3: <16} {4: <16}".format(
i + 1, properties[i]["name"], prop_typestr(properties[i]),
["","Read-Only"][prop_is_readonly(properties[i])],
str(properties[i]["value"])))
select = 0
while True:
try:
inval = input("\nSelect properties to set (0 to re-read, 'q' to quit) : ")
if inval.lower() == 'q':
print("Quitting...")
exit(5)
invals = inval.split(',')
selections = [int(val) for val in invals]
if min(selections) < 0 or max(selections) > len(properties):
raise ValueError("Invalid input")
break
except ValueError as e:
print(str(e) + "! Retry...")
if len(selections) == 1 and selections[0] == 0:
continue
set_values = []
set_indices = []
for select in selections:
while True:
inval = input("Enter value to set for property (" + properties[select - 1]["name"] + ") : ")
value = encode_prop_value(properties[select - 1],
str_to_prop_value(properties[select - 1], inval))
if value is None:
print("Invalid input! Retry...")
continue
break
set_values += [value]
set_indices += [select - 1]
if not set_property_values(obj_transport, properties, set_indices, set_values):
print("Failed to set values!")
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