What does your setup look like? Is this a standalone farm with the router hooked directly into ISP equipment? Is this a detached barn with ethernet ran from the house? A lot of variable.
This is a point of the answer being in the question. Add a wireless access point closer to the device or one with a better radio.
I added a range extender to my router. I put it halfway between my router and my outbuildings. It uses the same SSID. It will depend on the brand of your router if it will support one ssid.
Technically, the SSID and the password are immaterial, but they need to be on the same IP network. Just adding a “range extender” halfway between the router and devices would probably fix your issue and would reuse the existing wireless settings so you wouldn’t have to worry about the configuration.
They should not be different, but the same.
The channel should be different though and if you have no automatic controller for the WiFi channels, then they should be locked too, so one AP has channel 1,6 or 11 and the other has one of the other ones.
You can then added a third AP on the last channel if need be without having to resort to controller for WiFi channels.