I recently embarked on a project to automate my sprinkler system, and I wanted to share my experience and insights with the community. After researching various options, I decided to go with the PSF-B04 ESP8285 4-channel relay board, primarily because of its compatibility with Tasmota firmware. This combination has proven to be both cost-effective and highly customizable, which was exactly what I was looking for.
Initially, I followed a guide to flash the board with Tasmota, which went smoothly. The setup involved soldering programming wires directly to the ESP8285, but I found that GND, GPIO0, and 3.3Volts were easily accessible on other parts of the board, making the process less daunting. This was a crucial step, as it allowed me to retain the functionality of the board without major modifications.
One challenge I encountered was that while individual relays worked perfectly, attempting to switch on all four channels simultaneously caused the device to reboot. This was perplexing, especially since one of the boards worked flawlessly without any issues. After some troubleshooting, I discovered a mystery chip on the board that seemed to be causing the problem. By removing this chip and bypassing it, I was able to drive the ULN2003 directly, which resolved the issue and allowed all four relays to function concurrently.
This experience has been both educational and rewarding. It taught me the importance of understanding the hardware and not being afraid to experiment when faced with unexpected issues. The ability to customize the firmware and hardware to suit my specific needs has been a game-changer for my smart irrigation project.
I would love to hear from others who have worked with the PSF-B04 or similar boards. Have you encountered any unusual behavior or challenges? How did you overcome them? Your insights and experiences would be invaluable to me and others looking to embark on similar projects.
Thank you for taking the time to read my post, and I look forward to your feedback and suggestions!