Compared to the ESP32 we know and love, there are a few differences. The ESP32-S2 uses a single core xtensa LX7 core running at up to 240 mhz, where the current ESP32 uses either a single or dual core LX6.Social learning and social cognitive theory the differences between these cores is hidden away in marketing speak and press releases, but it appears the LX7 core is capable of many more floating point operations per cycle: apparently 2 FLOPS / cycle for the LX6, but 64 FLOPS / cycle for the LX7.Social learning and social cognitive theory this is fantastic for DSP and other computationally heavy applications. Other features on the chip include 320 kb SRAM, 128 kb ROM, and 16 kb of RTC memory.Social learning and social cognitive theory

Other features include an automatic power-down of the RF circuitry when it isn’t needed, support for RSA and AES256, and plenty of support for additional flash and srams should you need more memory.Social learning and social cognitive theory the packaging is a 7 mm x 7 mm QFN, so get out the microscope, enhance your calm, and bust out the flux for this one. Engineering samples will be available in june, and if espressif’s past performance in supplying chips to the community holds true, we should see some projects using this chip by september or thereabouts.Social learning and social cognitive theory

Over the last few months we’ve seen an influx of homebrew RC controllers come our way, and we’re certainly not complaining. While the prices of commercial RC transmitters are at an all-time low, and many of them can even run an open source firmware, there’s still nothing quite like building the thing yourself.Social learning and social cognitive theory how else are you going to get exactly what you want?

For this entry into the 2019 hackaday prize, [vitor de miranda henrique] is working on his own version of the ultimate open source remote control.Social learning and social cognitive theory his design follows some of the trends we’ve already seen in terms of outward design and hardware expandability, but also branches off into some new territory with features such as dual integrated displays.Social learning and social cognitive theory

Why does your controller need two displays? The top 4.3 inch TFT is linked up to a 5.2 ghz video receiver, which makes it perfect for controlling vehicles in “first-person” view, such as drones.Social learning and social cognitive theory the lower screen is a 2.8 inch touch screen from adafruit, which is intended to be used for navigating through menus and options once the firmware is fully fleshed out.Social learning and social cognitive theory

Powering the controller is a ESP32 and dual MCP23017 GPIO expanders to connect up to the array of input devices available to the user. The current iteration of the controller has ten switches, two encoders, some buttons, and a pair of scroll wheels for good measure.Social learning and social cognitive theory oh, and of course there are a couple of joysticks in the mix as well. All the devices terminate at a custom PCB in the back of the controller which looks to make modifying and adding input devices simple and neat.Social learning and social cognitive theory

Of course, your GPS clock will always tell the right time, but it won’t be really right. Your microcontroller will introduce all sorts of timing errors and jitter, so at best it’ll only be nearly right. [rick macdonald] has been striving to quantify and minimise these errors in his openpps project, which aims to be as accurate a GPS time and frequency reference as possible.Social learning and social cognitive theory

In a very comprehensive multi-page write-up, he details his progression, through the GPS modules he used, his experience with timing jitter when he used an ESP32 alone to process their output, and then his experiments with an FPGA and then temperature-compensated oscillators.Social learning and social cognitive theory it moves from being a mere description of a GPS clock into a fascinating run-down of both GPS timing itself and the development pitfalls he encountered along the way.Social learning and social cognitive theory at the end of it all he has a GPS clock in a smart 3D-printed enclosure which he admits as yet doesn’t do anything more than tell the time, but as he points out it’s a clock with minimised jitter, delay, and drift, and it remains an ongoing project that will evolve into a full-blown time and frequency standard.Social learning and social cognitive theory