MicroPython

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  MLX 90614 Sleep mode
  • testuser  

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  1602 LCD and I2C backpack with pycom
  i2c lcd displays 1602 • • tttadam  

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  @Lucas_Vieira I'm missing the print statements form the script. So your test script is not executed at all.
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  TEROS 12 and SDI-12
  sdi-12 teros12 • • tttadam  

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  @Pesien I made a PR for inverted UART signals. It is here: https://github.com/pycom/pycom-micropython-sigfox/pull/310
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  urequests and timeout?
  • zmaier  

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  [SOLVED] UART and MH-Z16 CO2 sensor
  micropython uart mh-z16 • • tttadam  

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  @robert-hh Thank you! :) I got it now. It's work like it's should. Maybe I should to open the window :D
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  [solved] MQTT and tls
  mqtt ssl tls • • tttadam  

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  I found the issue. I got wrong login name and pass from the client....
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  Modifying boot.py
  • smithclarkson01  

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  Communication with other lora device doesn't work
  bugs lora lopy4 feather m0 • • melkoutch  

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  @melkoutch the spreading factor determines the transmission speed, which in turn has an influence on range and resistance to interference (in theory at least). SF7 is the fastest, SF12 is the slowest. SF12 is so slow that it takes over a second to send a LoRaWAN frame with just a single data byte. In theory it gives a better range.
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  decode regex search
  python • • misterlisty  

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  @misterlisty for instance: indexs.group(0) But if you search for a fixed string, you can as well use index, e.g. try: found = response.index("2,1") except: found = -1 it returns either the position of the string or raises an error.
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  strptime
  • Phil  

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  Actually I think I can do what I need by using mktime() : t = (2009, 2, 17, 17, 3, 38, 1, 48, 0) secs = time.mktime( t ) print("time.mktime(t) : %f" % secs)
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  string.indexof() ?
  python • • misterlisty  

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  @misterlisty Not sure of the context exactly, but I am thinking you want to extract the "2,1" from the data returned from the CREG+ AT command? I came up with this to extract the RSSI from the LTE connection and use it in a text string for example.. # Get the current LTE signal quality squallteM = lteM.send_at_cmd('AT+CSQ').strip().split() rquallteM = int(squallteM[1].split(',')[0]) # Evaluate the returned signal quality Data rssilteM = 113 - ((rquallteM) * 2) ltesqual = ("LTE RSSI: -{} dbM".format(rssilteM)) The .strip() and .split() operators should do what you want.. Hope it helps.
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  Digital Signatures / ECC
  • mki64  

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  Import of variables from boot.py
  boot.py • • alidaf  

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  @PeterB I'm not using the pymakr plug-in, but form the discussion i recall, that there is an option to run safe boot before upload. Safe boot bypasses boot.py and main.py. In that case the objects defined in boot.py to not exist.
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  Sending sensor data to server using LoRa
  fipy lora pysense • • Archana Kadam  

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  @Lonefish Do you actually have a valid IP connection between the FiPy and the server? The topic of the subject talks about LoRa, but you can't perform HTTP requests over LoRa, you need to go through a gateway for that.
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  How to use "libpcre" on the Pycom MicroPython runtime?
  • andreas  

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  Hi again, we resolved this issue and it is easy to tackle if you know what has been happening to make things go south. So, let me explain. When installing micropython-urllib.parse with upip, this obviously pulls in all package dependencies. One dependency, the package micropython-re-pcre brings in the re.py module along with ffilib.py as a utility module to be able to talk to libpcre. However, all of this is not available on the Pycom platform, but Pycom itself ships a built-in re package, which would have worked right away when not being masked by the vanilla re.py shipped through micropython-re-pcre. So, we manually remove re.py and ffilib.py from the dist-packages folder before uploading the firmware using rshell. Then, urllib will use the built-in re.py module and everything works like a charm. Sorry for the noise and happy hacking, Andreas. P.S.: If you are interested in what we are building here, you are welcome to have a look at the Hiveeyes MPY data logger firmware. We'd love to hear about any feedback and suggestions you might have.
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  I2C Clock Stretching
  • brotherdust  

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  @abilio Do you have an update on clock stretching issue. There is also a new sensor SCD30 (from Sensiron) that face the same clock stretching issue. We can not see device address 0x61 on the BUS bus(0) on (P22, SCL=P23) nor bus(1) on (P9, SCL=P8). Sensor works fine ESP32 (arduino dev) Any workaround for this on pycom?
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  while True and serial/telnet connectivity
  • cmisztur  

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  @robert-hh Thank You. mqtt_client_lock = _thread.allocate_lock() def mqtt_check_msg_thread(client,lock): while True: try: #utime.sleep(1) with lock: client.check_msg() except OSError: print('MQTT failed to check_msg') with lock: if client.connect() != 0: utime.sleep(1) except: print('MQTT check_msg thread failure') def mqtt_setup(): global mqtt_client global l99_serial is_mqtt_connected = False with mqtt_client_lock: mqtt_client = MQTTClient(l99_serial, '192.168.2.107', 1883) mqtt_client.set_last_will('L99/{}/io/state/offline'.format(l99_serial), '', qos=1) mqtt_client.set_callback(mqtt_output_command_callback) is_mqtt_connected = mqtt_client.connect() == 0 if is_mqtt_connected: #Timer.Alarm(handler=mqtt_check_msg, ms=1000, arg=None, periodic=True) on_mqtt_connected(True) else: on_mqtt_connected(False) if is_mqtt_connected: _thread.start_new_thread(mqtt_check_msg_thread, (mqtt_client, mqtt_client_lock))
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  Communicate with Thingsboard using UMQTT
  iot send data umqtt • • brossingo  

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  @brossingo what was the output if the program when you ran it? Checking the return value of client.connect() might yield useful information.
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  lora.stats(), ACK packet
  • justin  

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  @jcaron Many thanks for the detailed explanation. Very helpful.
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  socket timeout
  gpy lte socket hologram • • brett  

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