NerdMiner v2 review — solo Bitcoin miner for the desk
Who is this for? Bitcoin enthusiasts and hobbyists who want to understand how mining works — not for anyone who wants to seriously mine Bitcoin. The chance of finding a block is astronomically small; the value is in the learning.
NerdMiner v2 review
Who is this for? Bitcoin enthusiasts and hobbyists who want to understand how mining works — not for anyone who wants to seriously mine Bitcoin. The chance of finding a block is astronomically small; the value is in the learning.
The NerdMiner is an ESP32 microcontroller with a small screen that mines on the Bitcoin network. The chance of finding a block is astronomically small. That’s also not the point.
What is the NerdMiner?
The NerdMiner v2 runs open-source firmware on an ESP32 chip. It connects via Wi-Fi to a Bitcoin solo mining pool, usually ckpool.org by default, and tries to find blocks. Every second it calculates hash values — the hash rate is in the rough range of tens of kH/s.
For comparison: the total Bitcoin network runs at hundreds of EH/s (exahashes per second) — more than 1017 hashes per second. The NerdMiner does tens of thousands per second. The chance of finding a block is comparable to winning the lottery while being struck by lightning simultaneously.
The community knows this. The NerdMiner is not bought as a profitable miner.
Specifications
| Property | Value |
|---|---|
| Chip | ESP32-S3 |
| Hash rate | On the order of tens of kH/s |
| Display | 1.9” TFT colour screen |
| Connection | Wi-Fi (2.4 GHz) |
| Power | USB-C (5V) |
| Firmware | Open-source (NerdMiner_v2 on GitHub) |
| Power consumption | ~1–2W |
| Price | Varies by builder or kit |
What you see on screen
The screen shows live: current hash rate, total hashes, uptime, pool connection status, and number of shares found. In the community there are people who run the NerdMiner for months without ever finding a block — and are perfectly fine with that.
Why people buy it
Educational: You see how mining works. The firmware is readable, the pool communication is visible, the statistics are real-time. For someone understanding how Bitcoin works, this is more concrete than an explanation.
Conversation starter: A small device on your desk mining Bitcoin attracts attention. Easier to explain than an abstract wallet.
Collection/hobby: The ESP32 community builds variants with different screens, 3D-printed enclosures, and custom firmware. There are dozens of variants on GitHub.
Lottery ticket: In the community, a found block is seen as a historic event. There are people who seriously try with multiple devices — fully understanding that the odds are vanishingly small.
Updating firmware
The NerdMiner runs actively maintained open-source firmware. Updates are straightforward via the web flasher at nerdminer.io or through Arduino IDE. The firmware regularly adds features: new pool support, UI improvements, statistics.
Caveats
This is not an investment. Electricity costs at roughly 1 to 2 watts are theoretically never offset by mining returns. That is the trade-off you make consciously.
No hardware wallet function. The NerdMiner doesn’t store Bitcoin and has no secure element. Use a Trezor Safe 3 for storing crypto.
Pros and cons
Pros
- Live display shows real hash rate, shares, and pool connection — makes Bitcoin mining mechanics tangible and visible
- Open-source firmware (NerdMiner_v2) actively maintained with regular updates via web flasher or Arduino IDE
- Power consumption of around 1 to 2 watts is negligible in daily use
- ESP32 community has dozens of hardware variants with custom enclosures and screens
- Good conversation starter; lively hobbyist community with its own variants and 3D-printed enclosures
Cons
- Not serious mining: tens of thousands of hashes per second versus an astronomical network hash rate
- Electricity costs will theoretically never be offset by mining returns
- No hardware wallet function — does not store Bitcoin, has no secure element
- The chance of finding a block is comparable to winning the lottery while being struck by lightning simultaneously
Conclusion
The NerdMiner does what it promises: an ESP32 doing Bitcoin mining, with a readable screen and actively maintained firmware. You don’t buy it to get rich but to understand how mining works, or simply because it’s a fun device.
See also:
- Trezor Safe 3 review — for securely storing Bitcoin and crypto