Topics created by falbriard

Hello @falbriard

all you can do is reading GPIO10 to get battery voltage. See documentation here - section PinMap - Keyboard&Battery Detect.

The charger IC cannot be queried as the two outputs CHRG and STDBY are not connected as you can see in the schematic.

Thanks
Felix

I observe that there seems to be an NTP init step at the begin of the default UIFlow2 firmware startup, as the required arguments are part of the burn and configuration options. There is no more NTP section in the UIFLow2 blocks but a so called “Time” section thats delivers the “set timezone” command, which is in error. Please confirm the NTP was moved into the firmware and "Time" and also check why the “timezone” module was not loaded by the firmware. Thanks for support. Shouldn't there be a mandatory Wifi connection setup before issuing an NTP request? Further, I got NTP data but with strange return values like: 2054,2,20,12,11.. . Why?

@falbriard glad you have it working.
In UIFlow2 there is now the Project zone. I'm writing a book on UIFlow2 for the CoreS3 (but the instructions works on any S3 series device) you can find a work in progress copy on face book but I'm slowly porting the books examples to Project Zone.

@falbriard

I have been testing LoRa with Meshtastic lately using ESP32 boards (Heltec and Lilygo) and am looking to try now with M5. Built into the platform is support for environment sensors, other may need a bit of work to add (which is what I am hoping to do). I have a test mesh of 6 nodes, and only 1 is connected to my WiFi. Each node sends telemetry data with is read by the one (on WiFi) which in turns sens the message to an MQTT server. I then use Node-Red to process and push write the data into MongoDB.

LoRaWAN uses LoRa to communicate with the gateway, so as long as it is reachable by the sensor you should be able to get your data.

The LoRaWAN gateway does the bit of connecting your sensors to the cloud/network where you can access them.

HTH.

@falbriard An attempt to write a logic with Blockly & MicroPython code (via UIFlow), able to store up to 1000 characters on a RFID tag:

# by Claude Falbriard - QcLab Brazil # RFID tag with RC522 layout from m5stack import * from m5stack_ui import * from uiflow import * import time import unit screen = M5Screen() screen.clean_screen() screen.set_screen_bg_color(0x000000) rfid_0 = unit.get(unit.RFID, unit.PORTA) inputsrt2 = None elecounter = None alldata = None inputstr1 = None inputdata = None inputstr4 = None cardready = None label0 = M5Label('RFID Reader', x=10, y=10, color=0xf5f2f2, font=FONT_MONT_14, parent=None) text_2 = M5Label('text_2', x=10, y=113, color=0xb1ed94, font=FONT_MONT_14, parent=None) text_4 = M5Label('text_4', x=10, y=138, color=0xccf1a6, font=FONT_MONT_14, parent=None) debug1 = M5Label('Debug: ', x=10, y=226, color=0xf09a9a, font=FONT_MONT_14, parent=None) alldata_label = M5Label('alldata', x=10, y=170, color=0xdff2d7, font=FONT_MONT_14, parent=None) inputd1 = M5Label('input data', x=10, y=48, color=0xe8f081, font=FONT_MONT_14, parent=None) text_1 = M5Label('text_1', x=10, y=88, color=0xcbeeb9, font=FONT_MONT_14, parent=None) elecounter = 0 # constructing an RFID RC522 compliant data writer # https://www.blindtextgenerator.com/lorem-ipsum # generate a string with max length of 1000 characters ipsumstr = """Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque eu, pretium quis, sem. Nulla consequat massa quis enim. Donec pede justo, fringilla vel, aliquet nec, vulputate eget, arcu. In enim justo, rhoncus ut, imperdiet a, venenatis vitae, justo. Nullam dictum felis eu pede mollis pretium. Integer tincidunt. Cras dapibus. Vivamus elementum semper nisi. Aenean vulputate eleifend tellus. Aenean leo ligula, porttitor eu, consequat vitae, eleifend ac, enim. Aliquam lorem ante, dapibus in, viverra quis, feugiat a, tellus. Phasellus viverra nulla ut metus varius laoreet. Quisque rutrum. Aenean imperdiet. Etiam ultricies nisi vel augue. Curabitur ullamcorper ultricies nisi. Nam eget dui. Etiam rhoncus. Maecenas tempus, tellus eget condimentum rhoncus, sem quam semper libero, sit amet adipiscing sem neque sed ipsum. N""" # chop test data string to 256 bytes ipsumstr = ipsumstr[:256] # split a text into 16 bytes elements, max size = 1000 def split_by_n(seq, n): '''A generator to divide a sequence into chunks of n units.''' while seq: yield seq[:n] seq = seq[n:] rc522list = list(split_by_n(ipsumstr, 16)) blkcount = len(rc522list) # process list by RC522 element max 1000 char validptr = [1,2,4,5,6,8,9,10,12,13,14,16,17,18,20,21,22,24,25,26,28,29,30,\ 32,33,34,36,37,38,40,41,42,44,45,46,48,49,50,52,53,54,56,57,58,\ 60,61,62,64,65,66,68,69,70,72,73,74,76,77,78,80,81,82,84,85,86] keyptr = [3,7,11,15,19,23,27,31,35,39,43,47,51,55,59,63,67,71,75,79,83] while True: alldata = '' inputstr1 = '' inputsrt2 = '' inputdata = '' inputstr4 = '' cardready = False wait(1) debug1.set_text('start reading ...') if rfid_0.isCardOn(): debug1.set_text('card found') inputdata = rfid_0.readUid() speaker.playTone(740, 1/2) inputd1.set_text(str(inputdata)) elecounter = 0 for ele in rc522list: blkdata = ele blkaddr = validptr[elecounter] rfid_0.writeBlock(blkaddr,blkdata) elecounter += 1 wait_ms(400) # read data only for debug inputstr1 = rfid_0.readBlockStr(1) inputsrt2 = rfid_0.readBlockStr(2) inputstr4 = rfid_0.readBlockStr(4) # all data stored on tag for blkcount in range (0,elecounter): blkaddr = validptr[blkcount] record = rfid_0.readBlockStr(blkaddr) alldata += record if inputdata == '1e1cb67cc8': power.setVibrationIntensity(80) power.setVibrationEnable(True) wait(0.5) power.setVibrationEnable(False) # show data for debug and validation text_1.set_text(str(inputstr1)) text_2.set_text(str(inputsrt2)) text_4.set_text(str(inputstr4)) alldata_label.set_text(str(alldata)) wait(2)

@felmue You are right, it seems to be a voltage mismatch. The UART requests 5V, but ESP32 delivers only 3.3V.
Reading: "On-board level shifter, Standard 5V TTL for I2C and UART, 3.3V TTL SPI"
Find more: https://manuals.plus/elechouse/pn532-nfc-rfid-module-manual#introduction
Time to buy a M5stack reader unit and use the standard UiFlow drivers. Thanks!

@felmue Now got some useful readings of Volts using the following code. Not sure about accuracy due to logarithmic scale. I've tested it with an AA 1,5 battery as input signal, connecting GND and ADC pin 32. As I already use a GPS and an expansion board, so at the moment SDA pin 32 at Core2 unit is the only available choice. My code:

execute:
from machine import ADC
adc=ADC(32)
adc.atten(ADC.ATTN_11DB)
while true (with blockly), execute:
signal = int(adc.read())
if signal == 4095:
signal = 0
percentage = float(signal / 4095 / 100)
volts = float(3.9 * percentage * 100)
label2 show volts (with blockly)

Now getting 0 at idle connection and +- 1.5 V when testing it with an AA battery as analog signal.

@felmue Thanks for support, problem solved.

Hello @falbriard

yes, port C (blue / GPIO13 / GPIO14) is blocked by the GPS module. However you can define a second serial connection in your code using port B (black / GPIO26 / GPIO36) and then connect the NB-IOT to port B.

And no, using two UART (serial) modules in parallel on the same port is not possible.

Thanks
Felix

@felmue Thanks for the detailed instructions. Now able to handle it.