Craftbeerpi

[Shanna]

When I have less beer in me, we can have a chinwag about this Shanna. It shouldn't be too complicated to do what you want. The pi will send out dc to your ssrs. Each unique state will need a different signal and then your laughing

Pretty much get it now. Wiring up the inputs of the incoming power is what I need to figure out. Looks I need to have two separate power feeds to run two SSRs, with each then powering it's own socket with the SSRs switched on/off via the  DC voltage coming from GPIO from the PI. Now thinking of getting a third SSR & actually wiring in a commando socket to switch the 5.5kw element in the HLT. Looks like I am going to busy over the next few months Let's talk it over the next time we meet over a pint. We can scratch the basic outline if a design down. Not 100% sure what connectors to use to wire up the DS18B20 as you mentioned RJ11 connectors & I hear telephone sockets. Might ask you for whatever links you used to but these when u have a moment.

Shanna

[darren996]

Dont ya just love this hobby.. So much stuff to spend all yer spare cash on

[Shanna]

Dont ya just love this hobby.. So much stuff to spend all yer spare cash on

Indeed & apologies for taking over your thread. This has been just the spur I need to switch to the raspberry pi.

Shanna

[darren996]

No hassle,  the more the merrier.  I think craftbeerpi will combine the best of brewpi and ardbir.

[molc]

One caveat is I wouldn't trust a pi for fermentation as they are prone to crashing. The brewpi is absolutely rock solid in that respect, either the arduino or spark version.

[terragady]

arduino based fermentation is fine, or even you can use ESP8266 but I am not sure about the stability but can do same thing as arduino and has wifi capability so you can plot your temp over time.

[Shanna]

Tried wiring the pi, ds18b20 & SSR up using a breadboard last night. Two temp probes are picked up by the pi & also get registered in craftbeerpi software. However I can't get the SSR powered up with the ground/gpio output specified from the web software. It marks gpio 17 to use for a heater but when I connect that to + terminal on the SSR & ground from the 5v side of the breadboard to the - terminal of the SSR. I tried the SSR with a 9v battery & it works. I suspect that the SSR I have (supposed to be 3-32DC) is not getting enough power from the pi via the breadboard. I tried reading the power output from the pi and it's just 3v. I have a fotek SSR, googling this suggests that it's the SSR not being manufactures correctly & it requiring more than 3v. Anybody any experience with dealing with these type of SSRS?

Going to try powering it direct off the PI pins to see if there is an issue with the breadboard.

Shanna

[terragady]

do you connect temp probes to GPIO4 in parasitic mode? So both to the same data pin?

[darren996]

Tried wiring the pi, ds18b20 & SSR up using a breadboard last night. Two temp probes are picked up by the pi & also get registered in craftbeerpi software. However I can't get the SSR powered up with the ground/gpio output specified from the web software. It marks gpio 17 to use for a heater but when I connect that to + terminal on the SSR & ground from the 5v side of the breadboard to the - terminal of the SSR. I tried the SSR with a 9v battery & it works. I suspect that the SSR I have (supposed to be 3-32DC) is not getting enough power from the pi via the breadboard. I tried reading the power output from the pi and it's just 3v. I have a fotek SSR, googling this suggests that it's the SSR not being manufactures correctly & it requiring more than 3v. Anybody any experience with dealing with these type of SSRS?

Going to try powering it direct off the PI pins to see if there is an issue with the breadboard.

Shanna

I have the same ssr connected directly to a 3v gpio pin on the pi zero.  I will double check the pins when i get home. I an only using the breadboard for the temp probes

[Shanna]

do you connect temp probes to GPIO4 in parasitic mode? So both to the same data pin?

Not sure what you mean by parasitic but yes both temperature probes are going to the same gpio number 4 pin. I wired both probes through a plastic connector block with the resistor crossing between data & power on the input side. Two grounds also on the input side & then a single output on the other side of the block output where I have a single ground, data and power going to ground on 5v side, data going to Gpio pin 4 & power going to power on the 3v side. Some additional tinkering with the voltmeter confirmed the source of the problem two dodgy wires (never was good at wiring ). For anyone interested I took off the breadboard & with the pi plugged in & switched off I tested the dc voltage on pin 3v & 3v rail ground pin & got 3.3v. Did the same on the 5v side with the 5v pin & the 5v rail ground pin & got 5.2v. Reattached the ribbon cable & breadboard & tried two new cables & got the same result. Tried my dodgy cables & nothing. Stripped my cables back & recrimped them & hey presto got the voltage light on the SSR. Powered everything up & booted the pi & started the x server & ran the craftbeerpi web interface & my mashtun herms pot boiler (SSR 1 light up). Grabbed the temperature probe in my hand & warmed it but & within 30 seconds temperature had risen to 24 & light on the SSR went out. Threshold was set set 2 below temperature setting of 26C. So it looks like it call works. Can't wait to see what version 2.2 looks like.

Off to eBay now to get a project box. Anybody have any leads on detachable 2-3 metre 1/2" NPT DS18b20 probes (apart from brewpi store) would appreciate it.

Shanna

PS: Anyone willing to swap some 40A AC-AC SSRs for corresponding 40A DC-DC SSR? I bought the AC variety in error a while back late one evening with out paying attention to the correct voltage

[Shanna]

Tried wiring the pi, ds18b20 & SSR up using a breadboard last night. Two temp probes are picked up by the pi & also get registered in craftbeerpi software. However I can't get the SSR powered up with the ground/gpio output specified from the web software. It marks gpio 17 to use for a heater but when I connect that to + terminal on the SSR & ground from the 5v side of the breadboard to the - terminal of the SSR. I tried the SSR with a 9v battery & it works. I suspect that the SSR I have (supposed to be 3-32DC) is not getting enough power from the pi via the breadboard. I tried reading the power output from the pi and it's just 3v. I have a fotek SSR, googling this suggests that it's the SSR not being manufactures correctly & it requiring more than 3v. Anybody any experience with dealing with these type of SSRS?

Going to try powering it direct off the PI pins to see if there is an issue with the breadboard.

Shanna

I have the same ssr connected directly to a 3v gpio pin on the pi zero.  I will double check the pins when i get home. I an only using the breadboard for the temp probes

Thanks appreciate that but no need it's working now after I redid my dodgy cabling

Shanna

[Leann ull]

Fascinated by this thread, just need someone to post me a link where I can buy one full assembled

[Shanna]

Fascinated by this thread, just need someone to post me a link where I can buy one full assembled

Will ur PID herms be coming on the market then?

Shanna

[Leann ull]

[darren996]

Box prep done,  waiting on a 5v convertor and a 3.5 inch touchscreen.