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description= NerdNOS setup guide: flash firmware, configure WiFi, connect to a solo mining pool, and start hashing on your ESP32-S3 open-source miner.;
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of nerdminers worldwide board components since the nerdnos ships without a display the board is simpler than the nerdminer s ttgo t display s3 here is what you will find on a typical nerdnos board esp32 s3 module the brain dual core xtensa lx7 processor running at up to 240 mhz with built in wifi and bluetooth both cpu cores are utilized for mining to maximize hashrate usb port usb c or micro usb depending on the specific board variant used for power delivery initial firmware flashing serial communication and debugging boot button used to enter bootloader mode for firmware flashing hold this while connecting usb or while pressing the reset button to force the board into programming mode reset button restarts the device press this to reboot the nerdnos without disconnecting power status led a small indicator led that provides basic status information power on wifi connected mining active the exact led behavior varies by firmware version flash memory stores the firmware and your configuration wifi credentials bitcoin address pool settings non volatile survives power outages and reboots wifi antenna either a pcb trace antenna built into the board or a small ceramic chip antenna sufficient range for most home setups though positioning near your router helps during initial setup esp32 s3 technical details cpu dual core xtensa lx7 up to 240 mhz ram 512 kb sram external psram varies by module flash 4 16 mb varies by module wifi 802 11 b g n 2 4 ghz only bluetooth ble 5 0 not used for mining usb native usb otg uart via usb bridge operating voltage 3 3v regulated from 5v usb input operating temperature 40 to 85 c power requirements the nerdnos is one of the most power efficient bitcoin miners in existence because it barely consumes any power at all the entire device runs from a standard usb port delivering 5v no special power supply no barrel jack no dedicated circuit any usb power source you already own will work phone charger any 5v usb charger rated at 500ma or higher which is essentially every charger made in the last decade laptop usb port direct connection to any computer usb power bank portable mining although the practical value is debatable usb hub connect multiple nerdnos devices to a single powered usb hub router usb port many modern routers have a usb port that can power the nerdnos at under 5 watts running the nerdnos 24 7 for an entire month consumes approximately 3 6 kwh at 0 10 0 15 kwh that is less than fifty cents per month you will never notice it on your electricity bill what you need before you begin hardware required nerdnos device esp32 s3 board usb cable usb c or micro usb depending on your board variant usb power source phone charger laptop or any 5v usb port software access required computer with chrome or edge browser for web based flashing and configuration 2 4 ghz wifi network with internet access bitcoin wallet address self custody you own the keys optional for advanced setup python esptool for command line firmware flashing serial terminal application putty screen minicom for serial debugging that is genuinely all you need the nerdnos is designed to be the simplest possible entry point into bitcoin mining hardware no soldering iron no heatsink compound no ethernet cable no complex networking a usb cable wifi and a bitcoin address ℹ️ pre flashed vs bare board nerdnos devices purchased from d central come pre loaded with nerdminer firmware ready to configure and mine right out of the box if you purchased a bare esp32 s3 board from another source and want to turn it into a nerdnos you will need to flash the firmware yourself both scenarios are covered in this guide firmware flashing if your nerdnos came from d central with firmware pre installed you can skip this section entirely and jump straight to initial wifi configuration this section is for users who need to flash or re flash the nerdminer firmware onto their esp32 s3 board either because they purchased a bare board need to recover from corrupted firmware or want to update to the latest release download the firmware the nerdnos runs the same nerdminer v2 firmware used by the nerdminer download the latest release from the official github repository firmware download url copy https github com bitmaker hub nerdminer_v2 releases on the releases page look for the latest stable release download the bin firmware file for your specific board since the nerdnos uses an esp32 s3 without a display select the appropriate binary typically named something like nerdminer_v2_esp32s3_noscreen bin or the equivalent for your board variant read the release notes carefully to match the correct binary to your hardware option a web based flasher recommended the easiest way to flash firmware onto the nerdnos this uses the web serial api built into chrome and edge browsers no software installation required connect the nerdnos to your computer via usb cable enter bootloader mode hold the boot button press and release the reset button then release the boot button on some boards simply hold the boot button while plugging in the usb cable open the web flasher navigate to the nerdminer v2 web flasher url check the github repository readme for the current flasher link in chrome or edge click connect a dialog will appear listing available serial ports select the one corresponding to your nerdnos usually labeled as usb serial or cp210x or ch340 select firmware version choose the latest stable release and the correct board variant click flash the browser will upload the firmware to your nerdnos this typically takes 1 2 minutes wait for completion do not disconnect the usb cable during flashing once complete the nerdnos will reboot with the new firmware ️ chromium browser required for web flasher the web based flasher uses the web serial api which is only available in chromium based browsers chrome edge brave and opera firefox and safari do not support web serial if you use those browsers use the esptool method below instead option b command line with esptool advanced for full control over the flashing process use esptool the official espressif flash programming utility install python if you do not have it python org install esptool install esptool copy pip install esptool connect the nerdnos to your computer via usb enter bootloader mode hold boot press reset release both or hold boot while plugging in usb identify your serial port on windows open device manager and look under ports com lpt on macos linux check dev tty erase existing flash recommended for clean installs erase flash memory copy esptool py chip esp32s3 port com3 erase_flash flash the firmware flash nerdminer firmware copy esptool py chip esp32s3 port com3 baud 460800 write_flash 0x0 nerdminer_v2_firmware bin replace com3 with your actual serial port on macos or linux it will be something like dev ttyusb0 or dev cu usbmodem replace the filename with the actual bin file you downloaded the nerdnos will reboot with the new firmware once flashing completes usb driver troubleshooting if your computer does not recognize the nerdnos when you plug it in you may need to install a usb to serial driver most esp32 s3 boards use either the cp2102 silicon labs or ch340 wch usb bridge chip download the driver from the chip manufacturer s website cp2102 driver or ch340 driver after installing unplug and replug the usb cable initial wifi configuration since the nerdnos has no screen all configuration happens through a wifi captive portal that the device creates on first boot or whenever it cannot connect to a saved wifi network this is the same access point ap mode used by the nerdminer but since there is no display to confirm status here is exactly how it works step 1 power on and enter ap mode plug the nerdnos into a usb power source on first boot or if no wifi network is configured the device will automatically create its own wifi access point you will know the nerdnos is in ap mode if the status led is blinking in a distinctive pattern varies by firmware version typically a slow blink or solid on a new wifi network appears in your device s wifi scanner if the nerdnos previously had a wifi network configured and you need to force it back into ap mode power cycle the device unplug and replug usb and watch for the ap network to appear within 10 15 seconds if the saved network is unavailable the device will fall back to ap mode automatically step 2 connect to the nerdnos access point on your phone laptop or tablet open wifi settings look for a network named nerdminerap or a similar name the exact ap name depends on the firmware version and may include the device s mac address connect to this network there is typically no password required for the ap but some firmware versions may use a default password like 12345678 check the release notes if prompted a captive portal should open automatically in your browser if it does not manually navigate to captive portal address copy http 192 168 4 1 step 3 enter wifi credentials on the configuration page you will see fields for your home wifi network ssid wifi name enter your wifi network name exactly as it appears this is case sensitive double check for trailing spaces password enter your wifi password special characters are supported but can occasionally cause issues with some firmware versions see troubleshooting ️ 2 4 ghz wifi only this is non negotiable the esp32 s3 only supports 2 4 ghz wifi networks it physically cannot see or connect to 5 ghz networks if your router uses a combined ssid for both bands the esp32 should auto connect to 2 4 ghz but if you experience issues create a dedicated 2 4 ghz only network in your router settings this is the single most common setup issue with all esp32 based miners step 4 enter your bitcoin address on the same configuration page you will find a field for your bitcoin wallet address this is the address where block rewards would be sent if your nerdnos finds a block open your self custody bitcoin wallet sparrow electrum bluewallet coldcard trezor or any wallet where you control the private keys copy a receive address we recommend a bc1 native segwit bech32 address for lowest fees paste it into the btc address field double check the address triple check it this is where a 3 125 btc block reward would go ️ self custody only not your keys not your coins never use an exchange deposit address coinbase binance kraken etc for mining exchanges can change deposit addresses without warning freeze your account or refuse mining related deposits use a wallet where you control the private keys this is bitcoin mining sovereignty is the entire point step 5 save and connect review your settings wifi name wifi password bitcoin address and click save the nerdnos will store the configuration in non volatile flash memory shut down the ap mode wifi network connect to your home wifi network connect to the configured mining pool begin mining automatically since there is no display you will not get a visual confirmation the status led should change its pattern to indicate a successful wifi connection typically solid on or a different blink pattern to confirm the nerdnos is mining check your mining pool s web dashboard see pool configuration or access the device s web interface on your local network pool configuration the nerdnos firmware comes with solo ckpool as the default mining pool the same default used by the nerdminer for a cpu miner at this hashrate solo mining is the only strategy that makes any sense pool mining would earn you fractions of a satoshi per year never enough to reach a payout threshold solo mining gives you a shot at the full 3 125 btc block reward long odds but never zero recommended solo mining pools solo ckpool default solo ckpool org 3333 the original solo mining pool maintained by con kolivas zero fees your bitcoin address is your username if your device finds a block the full reward goes to you the most battle tested solo pool in bitcoin public pool public pool io 21496 open source solo mining pool popular with the bitaxe and nerdminer communities zero fees clean web dashboard at web public pool io where you can monitor your nerdnos by entering your bitcoin address excellent for headless devices because the dashboard provides the monitoring your nerdnos lacks ocean mine ocean xyz 3334 decentralized mining pool focused on transparency and non custodial payouts supports small miners a strong choice for miners who prioritize decentralization in their pool selection too to change the pool access the nerdnos configuration portal either by forcing ap mode or via the web interface at the device s local ip and update the pool url and port fields the password field is typically x for all of these pools public pool is ideal for headless devices since the nerdnos has no screen public pool is an excellent choice because of its web dashboard navigate to the dashboard enter your bitcoin address and you can monitor your nerdnos hashrate shares best difficulty and uptime from any device your phone your laptop anywhere it is the closest thing to a remote display for your headless miner web interface walkthrough once the nerdnos is connected to your home wifi network you can access its built in web interface from any device on the same network this is your primary tool for monitoring and configuring the nerdnos it replaces the screen that the nerdminer has finding the device ip address the nerdnos gets an ip address from your router via dhcp when it connects to wifi to find it check your router s admin panel log into your router usually 192 168 1 1 or 192 168 0 1 and look at the connected devices list the nerdnos will appear with a hostname like nerdminer or esp32 or similar use a network scanner app apps like fing ios android or advanced ip scanner windows will list all devices on your network with their hostnames and ip addresses check serial output if you have the nerdnos connected to a computer via usb the serial output will print the assigned ip address on boot see serial debugging once you have the ip address for example 192 168 1 42 open a web browser on any device connected to the same network and navigate to web interface url copy http 192 168 1 42 replace the ip address with your nerdnos s actual ip dashboard overview the web interface provides a clean dashboard with the following information hashrate current mining speed in kh s expect approximately 80 120 kh s depending on your board variant and firmware version shares total number of valid shares submitted to the mining pool since last boot this number should steadily climb best difficulty the highest difficulty share your nerdnos has found this is your personal record your closest brush with solving a block higher is better uptime how long the device has been running since the last reboot wifi signal strength rssi value indicating how strong the wifi connection is anything above 70 dbm is good below 80 dbm may cause connection drops pool status whether the device is currently connected to th...
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