Matrix user forums

Hi Martin B5 or D2? --------- D2 is connected to INT0 by default, you are correct. I didn't use B5 at all, as I used ssd1306. I have to update the 'I have to change pin B5 to pin d2'. I didn't use B5 as an input, just used B5 (calculation icon) to change it to D2 to pull the input high. Saved some t...

Hi Martin Re: Did you get the code I posted to return anything? I have to change pinB5 to pinD2 in your code as D2 is connected to output of SYN470R Rf chip. I run this code on Nano a few times by using the Tx remote controller with 24-bit code (1527 protocol). No return. Re: It should be possible t...

Hi
Will look at RCSwitch IDE library

Thanks Martin

On Ard board LED B5 for debugging only: Understood
-------------
When I read the RCSwitch library I noted that after 1st high was detected system was waiting for the 2nd High.

Hello Thank you guys for looking at this issue I am in a motorhome (right now) 220 km away from Adelaide. I don't have access to my scope, etc. However after the last trip to Adelaide and a new PCB for Nano+rxb12 I can program it and test it. Interrupt IOT to IOC P ort IOC set to +ve trigger may be ...

Hello Martin Re: j1850 protocol I've read this post. Before I move to C-code I would like to use the Timer component... It works in simulation. However not in hardware. ------------- The rxb12 433mHz receiver output of SYN470R Rf chip has apprx 2.4v output. It is the result of Automatic Gain Control...

When I have to measure microseconds how good the Timer component is?
I noticed on forum that some people used a C-code.
Is it a way to do it?

Tx test/sim TTL signal Hello Thank you chipfryer27 for spending so much time in the Evil Lab. Where is Jockland? Is it in Scotland? No wonder it is so called there. We have spring in South Australia now. A lot of storms, wind and rain. I feel like I am in Scotland. Back to Evil Lab project. I don't...

D2 pin change and slow interrupt Hi First of all thanks to mnf for time and support. IN0 is too slow HC-12.fcfx program uses (Nano) monitoring the D2 INT0 (Timer0) interrupt. INT0 'ticks' 15Hz/Second or apprx 70mS (please correct me). However coming from rxb12 433mHz receiver pack of pulses lengh =...

About sampling ----------------------- You have suggested: For detecting a "0" (h - L - L - L) Detect high (beginning of pulse). Time = 0 Wait 1/2 time period and sample (Time = 175uS). Value = 1 Wait time period and sample (Time = 525uS). Value = 0 Wait time period and sample (Time = 875uS). Value ...

I am not sure how to run interrupt on Nano D2 input to check on 350uS if interrupt freq is 15Hz?
15 Hz = 66666uS
-------------------
Need to read again about mentioned by you about sampling...

Hi
Thank you for the link.

Hi

What to do?
One way -> use counter
2nd way (as you suggested) ->sample in the middle of a time period and take this value.

Hi Nano should be able to decode the full 24-bit string though. It does. I used RCSwitch library and it works. Nano does a job. 350uS pulse length is the length of a bit / 4... I believe it is. If one bit = 4 clocks, the Preamble High pulse = 350uS+31 Low(350*31), the High bit pulse = 350*3=1050uS+ ...

Hi About the pulse length... RCSwitch library has file RCSwitch.cpp Notice 1st value in string of values: 350uS for protocol 1 (24 bit) ------------------------------------------------------------------------- Format for protocol definitions: * {pulselength, Sync bit, "0" bit, "1" bit, invertedSigna...

Thank you chipfryer27. The last few days I was reading about some different protocols for 433.9mHz rf. There are a lot of articles on www, however most of them reapeat each other focusing on using some Arduino RF libraries without paying attention to protocols, pulse width, etc. I have checked brief...

Working on a code for 433mHz sensor data( rx only). I used the IDE Arduino with RCSwitch library and looks like it works. I can receive PIR information. Now I need to make the FC8 program. The TTL data format is: protocol 1 pulselength = 350, Sync bit = 1, 31 "0" bit = 1, 3 "1" bit = 3, 1 nvertedSig...

What about using Right$ in a calculation?
-------------------------------------------------------
Sure... but I wanted the integer as 077.

The only way of displaying a leading zero is in a string format
Looks like I have to flag the converted integer 77 (from "077" string) as negative.

Thanks

Hello I found some answer for question below ----------------------------------------------------------: SteveM » Tue Jun 10, 2014 Loosing 1st zero during converstion of num to string There's no way to do that directly, because the values are stored within the chip as fixed length binary numbers. e....

Glad it works.

Hello
Please have a look at the attached file.
I am not sure if that what you are after.

Hello
I have a question
Does the BacklightControl macro control the state of on-board of i2c module transistor?
Is it possible to show this macro?
Thanks

Hi
Please have a look at:
https://forum.arduino.cc/t/solved-lcd- ... ght/550691

Hello Ule
Can you ask your friend to 'ping' the bus before
the program will access sensor N6?

Found the solution