Posts made by alexburcea

• ESP32-Pi - how to get it into download mode

  Hi Tom,   Sorry for the late reply. As you can see from the card schematics, there is no capacitor on the EN pin, just a 15k pull-up resistor. We did not experience your behaviour, so we c...

  posted in Main forum

  

  alexburcea
  10/19/25, 6:31 AM
• Home Automation HAT - Reading state of output

  Hi Peter,   Increase the frequency of the Raspberry Pi I2C port to 400k. For some use cases, solve the problem. Alex.  

  posted in Main forum

  

  alexburcea
  10/17/25, 8:06 AM
• Sixteen 0-10V Analog Outputs Modbus

  Hi, The default port settings for Modbus are 38400,8,N,1. You either use the same on your scanner or change it using the command line interface (check the online help for details).  

  posted in Main forum

  

  alexburcea
  9/22/25, 9:41 PM
• Eight 24-Bit Analog Inputs DAQ 8-Layer Measurement offset errors

  We are migrating our forum, you can find this post here: https://sequentmicrosystems.com/community/forum/topic/195735/eight-24-bit-analog-inputs-daq-8-layer-measurement-offset-errors

  posted in Main forum

  

  alexburcea
  8/10/25, 5:28 PM
• Eight 24-Bit Analog Inputs DAQ 8-Layer Measurement offset errors

  Hi Jan, We recently discovered that we have a bug in the firmware, and we took care of it. Please update the card firmware, instructions here. Anyway, for good results, you need to calibrate the c...

  posted in Main forum

  

  alexburcea
  8/9/25, 5:58 PM
• Eight MOSFETS 8-Layer Stackable HAT Relay Wiring

  Hi, IGND is pin 1, and OUT is pin 2. You can vary the schematics as long as current flows from OUT (pin2) to IGND(pin 1).

  posted in Main forum

  

  alexburcea
  8/5/25, 8:25 PM
• Using Display Adapter Kit with 2004 display card

  You are right, the two extra pins are for RGB backlight type display. You can ignore these two pins for the monochrome version. As far as the buy options of the RGB display are limited, the Adafrui...

  posted in Main forum

  

  alexburcea
  7/29/25, 11:38 AM
• Mixing new and old cards

  I am glad you managed to communicate with all the cards. I did not realise you had no delay between reads. Sorry, the port number does not match the serial port names. I guess you found the corresp...

  posted in Main forum

  

  alexburcea
  7/19/25, 12:28 PM
• Mixing new and old cards

  - you found a bug, I will take a look, the 16relind must accept value up to 65535 Hard to answer the questions, but you could increase the I2C speed to 400k and try again with al the cards in the s...

  posted in Main forum

  

  alexburcea
  7/18/25, 5:15 PM
• Mixing new and old cards

  You can use any Raspberry Pi that has a 2x20-pin GPIO header, including Zero

  posted in Main forum

  

  alexburcea
  7/18/25, 4:29 PM
• Mixing new and old cards

  The color is arbitrarily chosen. When an LED is out of stock, we replace it with what is available. Could you test the 16relind as a single card on Raspberry?

  posted in Main forum

  

  alexburcea
  7/18/25, 4:02 PM
• Mixing new and old cards

  The LED blinks short (100ms) each second when in normal operation, and long 1s on 1s off when running the bootloader (update in progress or invalid firmware) The calibration phase for 16-universal ...

  posted in Main forum

  

  alexburcea
  7/18/25, 3:42 PM
• Mixing new and old cards

  The new cards are replacing the IOExpander with a processor; blinking instead of solid on is an indication of this. I am not sure what the problem is, whether the new stack is not working or just t...

  posted in Main forum

  

  alexburcea
  7/18/25, 11:43 AM
• RS232 buffer size on 8 serial port card?

  Thank you for the detailed debug. I will look into this. When changing the stack level, the interrupts must change on the second pair of pins. I will check the firmware.

  posted in Main forum

  

  alexburcea
  7/16/25, 11:42 AM
• Is there a way to disable 5v generation on MEGA BAS 5.1

  I am not sure why it is a bad idea to have both power sources; the one on the BAS card is a switching type and has no problem if it is put in parallel with a different one (it will supply current o...

  posted in Main forum

  

  alexburcea
  7/15/25, 12:54 PM
• RS232 buffer size on 8 serial port card?

  Hi, The ID1 signal is spare; we planned to have 4 cards in the stack, but the Linux kernel implementation of the SC16IS752 does not permit that, so only the ID0 signal is used. It's strange that i...

  posted in Main forum

  

  alexburcea
  7/14/25, 11:32 AM
• Node-red node failed to install

  There are two methods to install; usually, the one from the menu works every time, have you try it?

  posted in Main forum

  

  alexburcea
  7/7/25, 5:09 PM
• BAS 10K Reading Wrong

  Thanks for the confirmation. A new firmware(1.07) and megabas(1.2.9) version were released to support the calibration for resistance measurement.

  posted in Main forum

  

  alexburcea
  7/6/25, 6:20 PM
• BAS 10K Reading Wrong

  Hi, I found the problem and released a new firmware version 2.06. About the resistance calibration, it is not working properly, so it will take me more time to work on, probably a new firmware rel...

  posted in Main forum

  

  alexburcea
  7/6/25, 4:00 PM
• BAS 10K Reading Wrong

  Hi, The firmware also supports calibration for the resistance inputs, but the drivers were not updated. Let me add calibration support for the resistance input, which will also take care of the of...

  posted in Main forum

  

  alexburcea
  7/6/25, 11:55 AM