Bluetooth Thermometer Minds Your Meats

The summer may have come to a close here in the USA, but any time of the year is a good time for grilling. In the colder weather, it’s a drag to have to stay near the hot grill to keep an eye on your burgers and franks. [Eric Ely] thought it would be smarter to have a meat thermometer that sent his phone the current reading via Bluetooth.

Instead of starting from scratch, [Eric] took an off the shelf electronic thermometer and removed its temperature probe (which was a thermistor). The hardware used an off the shelf Bluetooth board with a companion battery board and prototype board. If you can’t bear to cut up a good thermometer, you can get replacement probes that ought to work just as well.

In addition to the boards and the scavenged thermistor, [Eric] used a couple of resistors. One resistor is in parallel with the thermistor to improve the linearity of the device’s response curve. The second resistor forms a voltage divider that the Bluetooth board reads.

The software (using Node.js and C) is available on Github. The C program reads the temperature and pushes it out using JSON. Node.js provides a server that [Eric] can hit with his phone’s Web browser.

Sure, you can buy wireless thermometers, but what self-respecting hacker wants to carry around a store-bought box just to display meat temperature? Viewing it on your phone has much more street cred.  Of course, a real hacker isn’t going to cook on a conventional grill, either.

Continue reading “Bluetooth Thermometer Minds Your Meats”

Hacking your grill for performance and features

Summer is winding down, which means that sales will be beginning on grills at stores all over the place. For those that enjoy the outdoor cooking experience, a nice new grill is always tempting. If you’re anything like me though, it can be hard to justify the expense. All you need is some fire right? Well, not if you want to smoke foods, or do long controlled jobs, basically anything but quickly searing something.

[Joe Brown] over at Gizmodo found himself wanting to upgrade from simple coals/wood to something fancier, but really didn’t want to shell out the $2,000 that he found would be necessary to get the mic features he wanted. So, he set out to find a good platform to mod and added the features he wanted separately. The end result was a nicely performing out door cooking appliance that only cost him $540.

This hack is on the simpler side, but his modification really did add some great features. Many of you could build the addons from scratch, which makes me wonder, how would you improve a grill, dear Hackaday Reader?

Meat smoker texts you when it is done


[Peter Rauch] has built this meat smoker that has a touch screen control interface. His system is capable of controlling the cooking by monitoring the internal temperature of the smoker as well as the temperature of the meat itself. His touch screen interface allows him to enter his desired parameters and it basically just takes over from that point and texts him when it is done.  You’ll have to download the pdf to get to the juicy details of his build, but it is an interesting read.

It looks like he’s using a 4-loop Gefran GFX4 temp controller in conjunction with a Modbus remote terminul interface and a TS8010 HMI touchscreen for the bulk of the electronics. It even has protection limits he can set to keep his family from bumping it up to 1200 degrees.

[via Makezine]