DSC 1555 50/300 RF3524 - Can't get this to work with my board ? Can someone identify

[CoderBlue]

I can't get this to work with my board which I thought was a PowerSeries. I'm getting an "disconnected" message after it initially says it is online.

My board is stamped "1555 30/500" and one of the chips has "R3524" on it. Is this a 1555MX PowerSeries or a classic ? Can anyone identify it ? Below is a picture. I've seen conflicting/confusing info online as to what board it is.

Also, any suggestions on how to troubleshoot this ? Do I need to modify the code or is it my wiring (I've tried the wiring suggested in the readme). I"m using a Wemos D1 Mini but running off a separate USB power with the Data and Clock lines wired per the readme (one to D1 and the other to D8). Thank you.

[CoderBlue]

I corrected some of the resistor wiring and now getting a "connected" message but all the output is "000000" unrecognized data:

00:18:37.963 -> 139.54: 00000000 0 00000000 00000000 [0x00] Unrecognized data[CRC OK]
00:18:38.296 -> 139.85: 00000000 0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [0x00] Unrecognized data[CRC OK]
00:18:38.328 -> 139.89: 00000000 0 [0x00] Unrecognized data[CRC OK]

[CoderBlue]

I got it working. I'm guessing its a PowerSeries 632 and the board is a plain 1555. Here is the manual: https://cms.dsc.com/download2.php?t=1&id=12408

The resistors suggested in the Readme did not work for me for the data pin. I checked all the voltages (I'm getting 6.5 volts on CLK, and 9.1 on data) and then calculated the resistors using an online voltage divider calculator to get the voltages below 3.3. The 10k/10k worked for the Clock but for the data pin I just used a 33k resistor. The D8 pin (GPI015) on the Wemos has an internal resistor so apparently you don't need a second resistor, with the 33k resistor the voltage dropped to about 2.4. .

Below is the wiring I used shown in the screenshot of the Fritzing.

Also on the example sketches, for Keybusreader I used these settings:

#define dscClockPin D1  // esp8266: D1, D2, D8 (GPIO 5, 4, 15)
#define dscReadPin D8   // esp8266: D1, D2, D8 (GPIO 5, 4, 15)
#define dscWritePin D2  // esp8266: D1, D2, D8 (GPIO 5, 4, 15)
dscKeybusInterface dsc(dscClockPin, dscReadPin);

Note that the dscWritePin paramater is deleted since I'm not using the virtual keypad.

I also found that from time to time I would get garbage in the serial monitor when uploading a sketch even when using the correct baud rate. I solved this by uploading a blank sketch (Arduino ide->New, then upload), then uploaded the sketch I wanted. I guess the code gets corrupted sometimes during the uploads (or maybe I interupted an upload).

Also, I found that I could just tap into the green/yellow/black/red wires from the back of the keypad, much more convenient than working in my closet! I had an extra length of ethernet cable and used that temporarily to stretch the 10 feet to the keypad to my computer desk and wire 3 of the strands to the black (-), yellow (clock) and green(data) contacts - the keypad continued to operate normally.

Well thank you very much for the code! Very appreciative of all the work that went into it. I'm looking forward to using it.