![smt32f103 blue pill schematic smt32f103 blue pill schematic](https://innovatorsguru.com/wp-content/uploads/2019/08/stm32-black-pill-schematic-800x506.jpg)
Here is a complete bill of material, with the approximate cost, as on eBay. Here is an overview video, with the project on a breadboard. PEC index sense, Limit sense, Reticule for Polar Scope) can be supported using the spare pins for the Blue Pill.
![smt32f103 blue pill schematic smt32f103 blue pill schematic](https://image.easyeda.com/histories/5ea50386c57f47eab6882d0a1c829781.png)
They both have a pin map (using the same file, and src/pinmaps/ file). Support is in the Alpha branch of OnStep (version 1.9.?). Although many boards state that they have 64K of flash (too small for OnStep), they do come with 128KB. The cost for these is around US $2.50 on eBay and AliExpress. It is based on the STM32F103C8T6, with 128KB flash memory, and 20KB RAM. The so-called Blue Pill is the main microcontroller for the STM32 port of OnStep. Of that family, the STM32F103 runs at 72MHz (that is 4.5X the Arduino Mega2560). The STM32 family of ARM Cortex 32-bit processors that are low cost, yet provide adequate processing power. Reticle: A pin is provided to turn on the light in the polar scope and/or an illuminated eyepiece. PEC Index sense: A pin is provided to detect the worm gear's index, for recording and playing back PEC (Periodic Error Correction). At the start of a slew, and the end of slew, a buzzer will sound. When the mount is tracking at sidereal rate, the LED will blink continuously.īuzzer: Tested. ST4 Port: Confirmed to work with a simple and smart hand controller. The TMC2130 is not working at present.įocuser: support for one focuser motor is provided (Axis4 in OnStep). Stepper Drivers: The DRV8825 and LV8729 are both verified to work. WiFi: Works with WeMos D1 Mini (recommended), ESP01 (requires wiring changes to 3.3V power instead of the default 5V wiring below), and NodeMCU Lolin (works, but too large of a footprint). You can use OnStep's extended command set, which is based on the popular Meade LX200 command set, to control the mount from Planetarium programs like Stellarium, Cartes du Ciel, KStars, Sky Planetarium The Black Pill (see below) has support in the pin map, but is not yet fully tested. It is currently the main focus of this effort. OnStep was ported to the STM32 platform by Khalid Baheyeldin, with valuable assistance provided by many people, including author of Onstep Howard Dutton, Dave Schwartz, Pierluigi Giorgi, and others.īefore you start, please read the entire page carefully.īoard Variants: The Blue Pill is fully supported, and is the recommended STM32 platform.
![smt32f103 blue pill schematic smt32f103 blue pill schematic](https://image.easyeda.com/histories/16cd72da57b245fd9d92a895cc229cff.png)