FYI, here is the link for X to https://www.jabitaxe.com/product-page/bitaxe-single-chip-miner-official with 10% discount for all Bitaxe Gamma Variants ( it comes to around US$134 before shipping cost for Bitaxe Basic model (Bitaxe Gamma Board, Basic Fan, Basic Heatsink and PSU 5V,6A ) ). There are also various Bitaxe Gamma Variants to choose from including all Over clocked variants . Every Bitaxe Gamma Variant has 10% discount. Pay using CC or cryptocurrency

FYI, here is the link for X to https://www.jabitaxe.com/product-page/bitaxe-single-chip-miner-official with 10% discount for all Bitaxe Gamma Variants ( it comes to around US$134 before shipping cost for Bitaxe Basic model (Bitaxe Gamma Board, Basic Fan, Basic Heatsink and PSU 5V,6A ) ). There are also various Bitaxe Gamma Variants to choose from including all Over clocked variants . Every Bitaxe Gamma Variant has 10% discount. Pay using CC or cryptocurrency

Yes it comes with case and Power supply.

JaBIT Solo Miner (Bitaxe V2.2) using a Single BM1397 Chip has now officially been released:

NOTE 1: Only purchase JaBIT Solo Miner (Bitaxe V2.2) from legitimate developers of bitaxe (Skot , Developeralgo and the bitaxe team) at https://www.algoceps.com/shop . This is currently the only official release and website to purchase JaBIT Solo Miner (bitaxe V2.2)

NOTE 2: We have noticed several scam artists trying to sell you bitaxe or some sort board called bitaxe which is not actually bitaxe . it's a SCAM using bitaxe.ca.

NOTE 2:NOTE 3: All information about JaBIT Solo Miner (Bitaxe V2.2) can be found on our discord channel
 - https://discord.gg/nRbcVjXm 
You can actually ask any questions to the actual developers and members of the bitaxe community. 
 

- Is the first fully open source hardware Bitcoin ASIC miner
- Powerful bitcoin miner in small factor( just slightly larger than size of a credit card), can mine any SHA256 Coins such as BitCoin(BTC), Bitcoin Cash(BCH) , Bitcoin SV (BSV), Litecoin Cash (LCC), NameCoin, Digitbyte, etc
-Uses efficient BM1397 Asic chip for mining. It is unlocked for overclocking (Voids warranty). It features a single 7nm technology BM1397 chip.
- Stock hashing speed: 200 GH (please note: these miners run very hot and require active cooling such as fan). It comes equipped with high RPM fan.
- High Speed: 350 GH++ (Running at clock speed of 545 MHz Higher speed requires above spec). To reach max speed of 500GH you will need 3 Amps per miner or PSU to supply 3A per miner!.  JaBIT comes with PSU to supply 5V, upto a Max 6A. i.e Max 30W for each miner.
- Completely silent operation, includes Mini heatsink to cool miner.
- Compatible with Windows, Mac and Linux OS using cgminer software. Includes an Online user manual with instructions for easy setup.
- Mining Algorithm: SHA-256, Minable Coins: Bitcoin (BTC), BitcoinCash (BCH), Acoin (ACOIN), Curecoin (CURE), Joulecoin (XJO), Unbreakable (UNB), Peercoin (PPC), Mark (DEM), Terracoin (TRC), BitcoinSV (BSV)


Advantages:

- Standalone: can mine directly to your pool over WiFi. No External computer needed.
- Embedded: low cost, low maintenance, high availability, high reliability, low power.
- ASIC: based on the very efficient BM1397 from Bitmain.
- Versatile: solo/pool mining, autotune power/heat/efficiency.
- Open Source: All design files are available .


Features

- ESP32-S3-WROOM-1 wifi microcontroller on board
- TI TPS40305 buck regulator steps down the 5V input to power the BM1397
- Maxim DS4432U+ current DAC digitally adjusts the BM1397 core voltage from 0.04V to 2.4V
- TI INA260 power meter measures the input voltage and current of the miner
- Microchip EMC2101 measures the BM1397 internal diode temperature. Also PWM controls the fan and monitors tach output.
- Two sweet RGB status LEDs


Current Status:
- The hardware has been built and tested. Current Batch is shipping now.
- Using cgminer on a separate computer, the JaBIT Solo Miner (Bitaxe v2.2) can mine in excess of 400 GH/s
- ESP32 miner firmware is now available but also under very active development to enhnace it by adding several essential nice-to-have features.

which discord group ? i belong to a couple

I thought the Bottom side is connect to GND and +Ve  while the top has copper insulating substrate below it not connected to GND . I believe what you mentioned in your comment , if correct then , a common Heatsink  for 2 chips is not possible. That's not a good design, i thought the top had great thermal conductivity  but poor/no electrical conductivity at all due to insulating substrate below the copper top

Can you elaborate ?

Aaaaaaagh!!!! Those scammers on Discord are notorious , even though Discord is good for development chatting

Can you upload that small testing code that you have or use to the github repo for testing .  i have managed to have the wifi connection done. Just started working on I2C

that's sounds great.

Yea, i did cut the trace connecting SDA to ESP32-S3 Pin-16/GPIO46 and was able to flash it without pressing any buttons. But when i connected  the pull-up resistor R19 to ESP32-S3 Pin-15/GPIO3 , i could not flash it.  Using ESP32-S3 Pins 4 to 8  or Pin 10 might work to connect to SDA.

FYI,  i did test and try to flash it ,

1. When i connect ESP32-S3 Pin-15 to SDA I2C pull-resistor as you described  ? i tested one of my 1-chip Bitaxe_V2 board and it has the same behaviour as before where i could not flash it.

2. When i disconnected the airwire from R19 over to pin 15 on the ESP32 (pink line). i was able to flash the ESP32-S3 without actually pressing the reset button. i know that ESP32-S3 with ESP-PROG it can automatically pull-down when flashing , so you don't have to press the boot and reset buttons manually.

is this a strange behaviour ?

Skot, did you manage when testing and sniffing the communication between BM1397 and ESP32-S3 Module to send a test mining job/work using the ESP32-S3 Pins ? Which pins did you use communicate to BM1397 Chips from ESP32-S3 module?

Trying to quickly perform just a quick test to see what BM1397 chip responds as per your sniffing notes https://github.com/skot/ESP-Miner/blob/master/bm1397_protocol.md

wow!!!, that's nice

Yes great catch , GPIO3 = Pin 15 is  floating by default and is one of the strapping pins which includes ( GPIO0=Pin27, GPIO045=Pin26, GPIO46=Pin16, GPIO3=Pin15) . So that should work

Finally got it sorted out. My USB power alone was not enough , i did have to juice it up with bench power to have the ESP32-S3 in bootloader mode

I have been running into issues flashing the ESP32-S3 modules using the ESP-PROG board and Tag-Cable 2030 NL cable. For some reason all my FTDI serial connections on UBUNTU 20.04 are ok and double check all pins, Voltages and everything is working correctly but for some reason i can't flash it. Opened up an issue on esptool Repo on github  https://github.com/espressif/esptool/issues/741

Keep getting this error: " Invalid head of packet (0x66): Possible serial noise or corruption. " . Any suggestions

i had posted that same research earlier in previous posts and had tried it out but it had a few issues and also it still needs to communicate with BM1397 chip, will look at it later  . Also we need a way of finding out the status of work on chip then roll extra nonce and send another as you said. Is using the a timer to wait for response from the chip good enough considering all the constraints we are facing?

Agreed , nothing  really special about MCU and Rust.

Assuming that someone is competent in both C and Rust , IMHO ,  multithreaded/concurrent code that is correct and produces no undefined behavior is better.  Also memory safety is a key feature that Rust brings to the table. In C you are on your own with concurrency and God help you if you are new to C programming. You will get baptism by fire.

 C / C++ and Python are my go-to languages but C tends to be a little messy to code sometimes but gets better with age i guess.