Search found 97 matches

by HermannSW
Mon Dec 27, 2021 8:16 am
Forum: Hardware
Topic: Dremel 18×18mm ESP32-C3-01M down to 18×15.8mm fully functional
Replies: 2
Views: 4428

Re: Dremel 18×18mm ESP32-C3-01M down to 18×15.8mm fully functional

@ESP_Sprite Good idea, I had that as well and ordered ESP32-C3-M1 modules as well, even more than ESP32-C3-01M. But its pin spacing is even smaller than the 1.1mm of the ESP-01F module as you can see in middle box. I will try to solder ESP-01F first with very big magnification on HDMI screen (I once...
by HermannSW
Sun Dec 26, 2021 10:38 pm
Forum: Hardware
Topic: Dremel 18×18mm ESP32-C3-01M down to 18×15.8mm fully functional
Replies: 2
Views: 4428

Dremel 18×18mm ESP32-C3-01M down to 18×15.8mm fully functional

I am building tiny robots (the MCU PCB "is" the platform) since quite some time: https://stamm-wilbrandt.de/en/forum/Tiny2040bot_new_design_control_over_wireless_Micropython_REPL.gif I had dremeled Tiny2040 MCU as well as DRV8833 motor controllers keeping them working before. Today I did dremel ESP3...
by HermannSW
Sat Mar 28, 2020 3:26 pm
Forum: ESP32 Arduino
Topic: Wifi joystick with display
Replies: 4
Views: 17194

Re: Wifi joystick with display

Previous raspcatbot was just too fast for reliable joystick control. So I replaced the 1500rpm gear motors with original 330rpm motors on my 2nd T101 platform. The new design with just one lipo is much smaller, until now 3S 1000mAh 25C lipo. But ordered 4S 1300mAh 95C lipos just arrived ;-) https://...
by HermannSW
Tue Mar 24, 2020 9:25 pm
Forum: ESP32 Arduino
Topic: Wifi joystick with display
Replies: 4
Views: 17194

Re: Wifi joystick with display

I found the reason for timeout not working yesterday, details in this posting: https://www.raspberrypi.org/forums/viewtopic.php?f=37&t=267999&p=1631419#p1631419 I did select only minimal speeds with the Wifi joystick, and even with that the robot already moves so fast! Seeing that, 5m/s on the groun...
by HermannSW
Mon Mar 23, 2020 11:19 pm
Forum: ESP32 Arduino
Topic: Wifi joystick with display
Replies: 4
Views: 17194

Re: Wifi joystick with display

I was able to control raspicatbot's motors for the 1st time with Wifi joystick. Unfortunately I had to comment out the lines handling the timeouts. Reason was that after a short time the timeouts triggered, although I did set timeout to 1s! I will need to debug that. The red button of Wifi joystick ...
by HermannSW
Sun Mar 22, 2020 7:48 pm
Forum: ESP32 Arduino
Topic: Wifi joystick with display
Replies: 4
Views: 17194

Re: Wifi joystick with display

After a series of raspcatbot functional testing now the caterpillar motors do not disturb the camera tilt servo anymore (after I provided a separate power source for the servo): https://www.raspberrypi.org/forums/viewtopic.php?f=37&t=267999&p=1630185#p1630185 https://stamm-wilbrandt.de/en/forum/Pass...
by HermannSW
Fri Mar 20, 2020 2:03 pm
Forum: ESP32 Arduino
Topic: Wifi joystick with display
Replies: 4
Views: 17194

Wifi joystick with display

I am just building a fast caterpillar robot (raspcatbot): https://www.raspberrypi.org/forums/viewtopic.php?f=37&t=267999 Even when it will drive autonomously, it needs a wireless heartbeat signal from wireless device. Either on command or when heartbeat got missed, the robot will do immediate emerge...
by HermannSW
Mon Oct 28, 2019 6:08 pm
Forum: ESP32 Arduino
Topic: ESP32-CAM ov2640 exposure control/FREX mode
Replies: 34
Views: 65994

Re: ESP32-CAM ov2640 exposure control/FREX mode

It turned out that Raspberry v1 camera can do global shutter capturing at daylight of fast rotating propeller as well: https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter#daylight https://raw.githubusercontent.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter/master/re...
by HermannSW
Tue Aug 06, 2019 6:47 pm
Forum: ESP32 Arduino
Topic: ESP32-CAM ov2640 exposure control/FREX mode
Replies: 34
Views: 65994

Re: ESP32-CAM ov2640 exposure control/FREX mode

I just had serious problems in getting any global shutter captures done. It turned out to be good to have serial monitor output in view. The router in vacation house is not good, the time to capture a frame toggles between below 200ms and above 1000ms. And in current state, implementation is fragile...
by HermannSW
Thu Aug 01, 2019 4:40 pm
Forum: ESP32 Arduino
Topic: Two ESP32-CAM synchronously streaming to PI4
Replies: 10
Views: 14522

Re: Two ESP32-CAM synchronously streaming to PI4

- Idea is to connect both ESP32 with a wire and trigger an interrupt to capture synchronously the picture. - Adding fb = esp_camera_fb_get() to the interrupt routine causes a watchdog error. - I don't understand well how the server routine works, so no idea how to get this synchronously to the inte...