Nothing spectacular
either trials via module or the example do not work
what is the order to initiate GPRS transmition - upload to a server?
This second attempt throws name 'pyb' isn't defined
from m5stack import *
from m5ui import *
from uiflow import *
import module
setScreenColor(0x222222)
Driver for SIM800L module (using AT commands)
MIT License; Copyright (c) 2017 Jeffrey N. Magee
https://github.com/jeffmer/micropython-upyphone
import math
kludge required because "ignore" parameter to decode not implemented
def convert_to_string(buf):
try:
tt = buf.decode('utf-8').strip()
return tt
except UnicodeError:
tmp = bytearray(buf)
for i in range(len(tmp)):
if tmp[i]>127:
tmp[i] = ord('#')
return bytes(tmp).decode('utf-8').strip()
class SIM800LError(Exception):
pass
def check_result(errmsg,expected,res):
if not res:
res = 'None'
#print(errmsg+res)
if not expected == res and not res == 'None':
raise SIM800LError('SIM800L Error {} {}'.format(errmsg,res))
class SIM800L:
def __init__(self,uartno): # pos =1 or 2 depending on skin position
self._uart = pyb.UART(uartno, 9600, read_buf_len=2048)
self.incoming_action = None
self.no_carrier_action = None
self.clip_action = None
self._clip = None
self.msg_action = None
self._msgid = 0
self.savbuf = None
self.credit = ''
self.credit_action = None
def callback_incoming(self,action):
self.incoming_action = action
def callback_no_carrier(self,action):
self.no_carrier_action = action
def callback_clip(self,action):
self.clip_action = action
def callback_credit_action(self,action):
self.credit_action = action
def get_clip(self):
return self._clip
def callback_msg(self,action):
self.msg_action = action
def get_msgid(self):
return self._msgid
def command(self, cmdstr, lines=1, waitfor=500, msgtext=None):
#flush input
#print(cmdstr)
while self._uart.any():
self._uart.readchar()
self._uart.write(cmdstr)
if msgtext:
self._uart.write(msgtext)
# if waitfor>1000:
# pyb.delay(waitfor-1000)
buf=self._uart.readline() #discard linefeed etc
#print(buf)
buf=self._uart.readline()
#print(buf)
if not buf:
return None
result = convert_to_string(buf)
if lines>1:
self.savbuf = ''
for i in range(lines-1):
buf=self._uart.readline()
if not buf:
return result
#print(buf)
buf = convert_to_string(buf)
if not buf == '' and not buf == 'OK':
self.savbuf += buf+'\n'
return result
def setup(self):
self.command('ATE0\n') # command echo off
self.command('AT+CRSL=99\n') # ringer level
self.command('AT+CMIC=0,10\n') # microphone gain
self.command('AT+CLIP=1\n') # caller line identification
self.command('AT+CMGF=1\n') # plain text SMS
self.command('AT+CALS=3,0\n') # set ringtone
self.command('AT+CLTS=1\n') # enabke get local timestamp mode
self.command('AT+CSCLK=0\n') # disable automatic sleep
def wakechars(self):
self._uart.write('AT\n') # will be ignored
# pyb.delay(100)
def sleep(self,n):
self.command('AT+CSCLK={}\n'.format(n))
def sms_alert(self):
self.command('AT+CALS=1,1\n') # set ringtone
# pyb.delay(3000)
self.command('AT+CALS=3,0\n') # set ringtone
def call(self,numstr):
self.command('ATD{};\n'.format(numstr))
def hangup(self):
self.command('ATH\n')
def answer(self):
self.command('ATA\n')
def set_volume(self,vol):
if (vol>=0 and vol<=100):
self.command('AT+CLVL={}\n'.format(vol))
def signal_strength(self):
result = self.command('AT+CSQ\n',3)
if result:
params=result.split(',')
if not params[0] == '':
params2 = params[0].split(':')
if params2[0]=='+CSQ':
x = int(params2[1])
if not x == 99:
return(math.floor(x/6+0.5))
return 0
def battery_charge(self):
result = self.command('AT+CBC\n',3,1500)
if result:
params=result.split(',')
if not params[0] == '':
params2 = params[0].split(':')
if params2[0]=='+CBC':
return int(params[1])
return 0
def network_name(self):
result = self.command('AT+COPS?\n',3)
if result:
params=result.split(',')
if not params[0] == '':
params2 = params[0].split(':')
if params2[0]=='+COPS':
if len(params)>2:
names = params[2].split('"')
if len(names)>1:
return names[1]
return ''
def read_sms(self,id):
result = self.command('AT+CMGR={}\n'.format(id),99)
if result:
params=result.split(',')
if not params[0] == '':
params2 = params[0].split(':')
if params2[0]=='+CMGR':
number = params[1].replace('"',' ').strip()
date = params[3].replace('"',' ').strip()
time = params[4].replace('"',' ').strip()
return [number,date,time,self.savbuf]
return None
def send_sms(self,destno,msgtext):
result = self.command('AT+CMGS="{}"\n'.format(destno),99,5000,msgtext+'\x1A')
if result and result=='>' and self.savbuf:
params = self.savbuf.split(':')
if params[0]=='+CUSD' or params[0] == '+CMGS':
return 'OK'
return 'ERROR'
def check_credit(self):
self.command('AT+CUSD=1,"*100#"\n')
def get_credit(self):
return self.credit
def delete_sms(self,id):
self.command('AT+CMGD={}\n'.format(id),1)
def date_time(self):
result = self.command('AT+CCLK?\n',3)
if result:
if result[0:5] == "+CCLK":
return result.split('"')[1]
return ''
def check_incoming(self):
if self._uart.any():
buf=self._uart.readline()
# print(buf)
buf = convert_to_string(buf)
params=buf.split(',')
if params[0] == "RING":
if self.incoming_action:
self.incoming_action()
elif params[0][0:5] == "+CLIP":
params2 = params[0].split('"')
self._clip = params2[1]
if self.clip_action:
self.clip_action()
elif params[0][0:5] == "+CMTI":
self._msgid = int(params[1])
if self.msg_action:
self.msg_action()
elif params[0][0:5] == "+CUSD":
if len(params)>1:
st = params[1].find('#')
en = params[1].find('.',st)
en = params[1].find('.',en+1)
if st>0 and en>0:
self.credit = '£'+params[1][st+1:en]
if self.credit_action:
self.credit_action()
elif params[0] == "NO CARRIER":
self.no_carrier_action()
# http get command using gprs
def http_get(self,url,apn="giffgaff.com"):
resp = None
rstate = 0
proto, dummy, surl = url.split("/", 2)
is_ssl = 0
if proto == "http:":
is_ssl = 0
elif proto == "https:":
is_ssl == 1
else:
raise ValueError("Unsupported protocol: " + proto)
try:
# open bearer context
res = self.command('AT+SAPBR=3,1,"Contype","GPRS"\n')
check_result("SAPBR 1: ",'OK',res)
res = self.command('AT+SAPBR=3,1,"APN","{}"\n'.format(apn))
check_result("SAPBR 2: ",'OK',res)
res = self.command('AT+SAPBR=1,1\n',1,2000)
check_result("SAPBR 3: ",'OK',res)
# now do http request
res = self.command('AT+HTTPINIT\n',1)
check_result("HTTPINIT: ",'OK',res)
res = self.command('AT+HTTPPARA="CID",1\n')
check_result("HTTPPARA 1: ",'OK',res)
res = self.command('AT+HTTPPARA="URL","{}"\n'.format(surl))
check_result("HTTPPARA 2: ",'OK',res)
res = self.command('AT+HTTPSSL={}\n'.format(is_ssl))
check_result("HTTPSSL: ",'OK',res)
res = self.command('AT+HTTPACTION=0\n')
check_result("HTTPACTION: ",'OK',res)
for i in range(20): #limit wait to max 20 x readline timeout
buf = self._uart.readline()
if buf and not buf==b'\r\n':
buf = convert_to_string(buf)
#print(buf)
prefix,retcode,bytes = buf.split(',')
rstate = int(retcode)
nbytes = int(bytes)
break
res = self.command('AT+HTTPREAD\n',1)
buf = self._uart.read(nbytes)
check_result("HTTPACTION: ",'+HTTPREAD: {}'.format(nbytes),res)
if buf[-4:] == b'OK\r\n': # remove final OK if it was read
buf = buf[:-4]
resp = Response(buf)
except SIM800LError as err:
print(str(err))
self.command('AT+HTTPTERM\n',1) # terminate HTTP task
self.command('AT+SAPBR=0,1\n',1) # close Bearer context
return resp
def test(self):
r = self.http_get('http://exploreembedded.com/wiki/images/1/15/Hello.txt')
print(r.text)
class Response:
def __init__(self, buf, status = 200):
self.encoding = "utf-8"
self._cached = buf
self.status = status
def close(self):
self._cached = None
@property
def content(self):
return self._cached
@property
def text(self):
return str(self.content, self.encoding)
def json(self):
import ujson
return ujson.loads(self.content)
phone = SIM800L(1)
print(phone.signal_strength())
