Monitor & control your Antminer T21 from anywhere
AntminerTools gives you live hashrate, per-chain chip & PCB temperatures, power draw and remote reboot for your Antminer T21 fleet — on your phone or desktop, with no port forwarding and no VPN. Setup takes 2 minutes.
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Antminer T21 — models & specifications
Manufacturer-rated values; they vary by batch and work mode. AntminerTools reads live values directly from each unit.
| Model | Hashrate | Power | Cooling |
|---|---|---|---|
| Antminer T21 | 190 TH/s | 3610 W | Air |
| Antminer T21 (variants) | 180–190 TH/s | 3420–3610 W | Air |
How to monitor your Antminer T21
Run the lightweight connector agent on any PC or Raspberry Pi on your farm's network, click Scan, and every Antminer T21 on your subnet appears automatically — model, worker name, serial and MAC included. From then on it's live stats every 30 seconds.
Everything you get for your Antminer T21
Running the Antminer T21 day to day — what to watch
Antminer T21 rigs mine SHA-256 (Bitcoin). Specs tell you what the machine can do; day-to-day monitoring is about noticing early when it stops doing it. Here is what experienced operators watch on this model, and how to automate it.
Temperatures and cooling
The T21 is the value air-cooled workhorse of the current generation. It runs slightly warmer per terahash than an S21 at the same room temperature, so give it honest airflow and keep chip temps under 80 °C for headroom before the 85 °C alert.
Power, efficiency and what they cost
Across the variants above, efficiency works out to roughly 18–19 J/TH at wall power — the Antminer T21 (variants) is the efficiency leader of the family. At $0.06/kWh, every 100 W of extra draw costs about $4.30 a month, which is why the dashboard tracks efficiency per unit and not just raw hashrate.
The signals that matter
T21s are typically deployed for price, in bigger batches — which makes per-unit babysitting unrealistic and automation the point. Offline detection plus hashrate-zero auto-restart covers the two failures that actually cost money at scale.
A T21 that hashes but reads high J/TH is usually dusty or hot, not broken — efficiency drift is your early-warning cooling metric.
Recommended alert setup for the Antminer T21: a high-temperature rule at 85 °C chip temp, a hashrate-zero rule with auto-restart (a ten-minute boot grace stops false alarms after reboots), and an offline rule that emails you about a minute after a unit stops answering. All three take under a minute to create in Alerts — see the docs for details, or the guide to monitoring your fleet remotely.
Antminer T21 monitoring — frequently asked questions
How do I monitor my Antminer T21 remotely?
Create a free farm, run the connector agent on any PC or Raspberry Pi on the same network as your Antminer T21, then hit Scan. You'll see live hashrate and temperatures within a minute, from anywhere — no port forwarding, no VPN, no static IP.
Can I see Antminer T21 temperatures and get overheat alerts?
Yes. AntminerTools reads per-chain chip and PCB temperatures every 30 seconds and can automatically put an Antminer T21 to sleep if it overheats, plus email you on the Unlimited plan.
Does it work with every Antminer T21 variant?
Yes — every Antminer T21 running stock Bitmain firmware with the standard web interface is supported, including Hydro and immersion variants, with special handling for water-cooled temperature sensors.
How much does Antminer T21 monitoring cost?
Free for 1 farm and up to 4 miners with full monitoring and remote control. Paid plans add capacity from $3/mo, and email alerts + remote desktop on Unlimited.
Start monitoring your Antminer T21 — free
Create your account, run the agent, and see every Antminer T21 live — before your coffee gets cold.
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