5 ms·
> With how much ESPs go for right now I kinda doubt that D1 Minis are like $1.50 and ESP01s are $0.95.
by cptskippy 4y ago
> With how much ESPs go for right now I kinda doubt that
D1 Minis are like $1.50 and ESP01s are $0.95.
- moffkalast 4y agoGood luck controlling an 8 pin relay with 4 accessible pins hah. The 01s are cheap for a reason - they're useless for most projects, hell I'm always running out of pins even on the esp32-cams.
- dekhn 4y agoDo you mean this? https://www.amazon.com/CANADUINO-WEMOS-Minikit-240MHz-Bluetooth/dp/B07KWHRM5R https://www.amazon.com/CANADUINO-WEMOS-Minikit-240MHz-Blueto... because it has a lot more than 4 accessible pins.
- moffkalast 4y agoNope, I mean this: https://www.amazon.com/MakerFocus-Wireless-Transceiver-DC3-0-3-6V-Compatible/dp/B01EA3UJJ4 https://www.amazon.com/MakerFocus-Wireless-Transceiver-DC3-0... 8 pins, half of those gnd, vin, reset, and something else. 4 are usable I think.
- cptskippy 4y agoThat's an ESP-01. It has 4 GPIO with some restrictions but you are able to simultaneously run an I2C bus and Serial bus giving you tremendous flexibility. You can get those in bulk for less than a dollar each and are my most used microcontroller. They're so easy to deploy and ear easily powered of USB wall warts with a regulator.
- cptskippy 4y agoThe ESP01 works perfectly for most sensor projects. It can handle I2C and serial IO simultaneously. If you really need more GPIO you can get an I2C based IO Expander to add 10 more GPIO.
- moffkalast 4y agoMeh, those cost extra and don't really do analog in or PWM out and have dreadful response time. Plus you have to deal with i2c which adds complexity. I suppose in this case you could do it in that roundabout way by stacking two of those for relay control since it's as basic as it gets.