{"id":2778,"date":"2023-03-06T14:01:24","date_gmt":"2023-03-06T14:01:24","guid":{"rendered":"http:\/\/funkboxing.com\/wordpress\/?p=2778"},"modified":"2023-03-06T14:01:27","modified_gmt":"2023-03-06T14:01:27","slug":"esp32copycat","status":"publish","type":"post","link":"http:\/\/funkboxing.com\/wordpress\/?p=2778","title":{"rendered":"ESP32CopyCat"},"content":{"rendered":"\n
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I never improved my ‘ESPCreep’ (https:\/\/github.com\/funkboxing\/espcreep) Servo Drive robot car, mostly because the 3d printing issues were tiresome, but I still wanted a simple drive platform and kept looking around. I found this pretty nice little ‘Quicker’ package on Aliexpress (on the left). https:\/\/www.aliexpress.us\/item\/3256803512050979.html.<\/p>\n\n\n\n

After looking at it online for about a year I finally talked myself into ordering one. A month later it arrived and I didn’t trust whatever they flashed from the factory and had trouble getting the source code because it was on Baidu and in Chinese. From the one pdf I could access and some googling I found the code must have been derived from this: https:\/\/www.pilothobbies.com\/product\/scout32\/. So with that in hand I was able to flash a working control webserver. I was pretty happy with the purchase but after driving it around for about 5 minutes I started thinking about making my own.In the past I’d chosen 360deg servo drive because on paper it’s a great solution. One PWM line per motor controls both speed and direction. Problem is you’re limited to a servo’s power and package, which aren’t ideal. Also you have to find the ‘center\\stop’ position on each servo and it’s never exactly zero. DC motors need a motor controller and that increases the part count.<\/p>\n\n\n\n

But seeing the ‘Quicker’ car and code I saw it’s pretty easy to work with DRV8833 H-bridges. It’s only 2 PWM per motor and you get all the power and options of using DC motors. Also I happened to have a bunch of HW-627 DRV8833 modules I got for steppers so it wasn’t hard to start breadboarding it all up. Also had some boost-charge modules and some 18650 batteries and holders.<\/p>\n\n\n\n

So after breadboarding success I soldered\\glued the monstrosity on the right together. Though the wheels are literally made of garbage it moves around okay. After that I remembered Fritzing and OSH Park exist so I slapped together a PCB and sent off to have 3 made for $20, which includes expedited production.
Let’s just take a second to think about how awesome it is that things exist that let me write that last sentence, and that it only cost $20.<\/p>\n\n\n\n

So while I’m waiting for that to come in I’ve got some other notions about a ‘Modular Robotic Funhouse’ that I need to play with. I’ll post more on that later. I’ll post the code later, right now it’s still just the Scout32 code with ArduinoOTA added for convenience.<\/p>\n\n\n\n

Here are the parts:
ESP32-Cam
HW-627 (DRV8833 Dual H-Bridge)
HW-775 (Boost-Charge)
18650 Battery holder and battery
(2) N20 Motors<\/p>\n","protected":false},"excerpt":{"rendered":"

I never improved my ‘ESPCreep’ (https:\/\/github.com\/funkboxing\/espcreep) Servo Drive robot car, mostly because the 3d printing issues were tiresome, but I still wanted a simple drive platform and kept looking around. I found this pretty nice little ‘Quicker’ package on Aliexpress (on the left). https:\/\/www.aliexpress.us\/item\/3256803512050979.html. After looking at it online for about a year I finally […]<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"http:\/\/funkboxing.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2778"}],"collection":[{"href":"http:\/\/funkboxing.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/funkboxing.com\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/funkboxing.com\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/funkboxing.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2778"}],"version-history":[{"count":2,"href":"http:\/\/funkboxing.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2778\/revisions"}],"predecessor-version":[{"id":2782,"href":"http:\/\/funkboxing.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2778\/revisions\/2782"}],"wp:attachment":[{"href":"http:\/\/funkboxing.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2778"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/funkboxing.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2778"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/funkboxing.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2778"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}