NRF24L01 vs HC-05 vs ESP-NOW: Cheap Wireless Compared
NRF24L01 vs HC-05 vs ESP-NOW: Cheap Wireless Compared
Quick answer: The NRF24L01 (Rs.85) is a cheap SPI radio with roughly 100m range; the HC-05 (Rs.240) is a Bluetooth serial bridge with about 10m range. ESP-NOW isn't a product at all — it's a WiFi-based protocol already built into every ESP32, so if both ends of your link are ESP32 boards, you don't need to buy either module.
Written and fact-checked by Compoden's engineering team, India. Every spec and price below is read from our live catalogue record for the exact part named, except where noted as general protocol knowledge rather than a catalogue figure — ESP-NOW is a protocol, not a part we sell, and we say so plainly rather than inventing a spec sheet for it. Published 19 August 2026 · Last updated 19 August 2026.
Two of these three are physical modules you wire up; the third is software already sitting inside a chip you may already own. That's the first decision this comparison actually needs to make — before range, speed or price, figure out whether you need to buy anything at all.
| Spec | NRF24L01 | HC-05 | ESP-NOW |
|---|---|---|---|
| Price (India, COD) | Rs.85 | Rs.240 | Rs.0 — built into ESP32/ESP8266 |
| Interface | SPI | UART (Bluetooth SPP) | Software (WiFi radio) |
| Range | ~100m open-air | Up to 10m | Vendor-cited, not catalogue-verified here |
| Speed | Up to 2Mbps | Serial baud (9600 default) | Faster than a full WiFi/TCP link, no catalogue figure |
| Needs a separate module? | Yes | Yes, unless host is ESP32 | No, if both ends are ESP32/ESP8266 |
Verdict in one line: if you already have ESP32 boards on both ends, use ESP-NOW and buy nothing; otherwise the NRF24L01 wins on range and price, the HC-05 wins on how many phones and laptops can already talk to it.
What actually is each of these three?
Genuinely different categories, not competing versions of the same thing. The NRF24L01 is a bare 2.4GHz radio chip on an SPI breakout — our record names it directly as the Nordic nRF24L01+, a point-to-point or mesh link with no protocol beyond what the RF24 library implements for you. The HC-05 is a Bluetooth Classic module that presents itself to your microcontroller as a plain serial port — our record calls it "a transparent SPP serial bridge, no dedicated driver," meaning your code just reads and writes bytes as if it were a wired UART. ESP-NOW is neither a chip you buy nor a serial bridge — it's a connectionless WiFi-based protocol that Espressif built into the ESP32 and ESP8266's existing WiFi radio, letting two such boards exchange small packets directly without a router, pairing, or a TCP connection.
The mechanics of ESP-NOW, since this lane carries no catalogue record for a protocol, are described here as general, well-documented behaviour rather than a measured spec: each board registers the other's WiFi MAC address as a peer, then sends short packets connectionlessly — no handshake, no IP address, no router in the middle. That's a genuinely different shape from both physical modules: an NRF24L01 or HC-05 link exists because you wired a radio to a pin, while an ESP-NOW link exists purely in firmware running on hardware you likely bought for its WiFi in the first place.
Do you even need to buy a module?
Only if your board doesn't already have the radio you need — and our own HC-05 record makes this explicit for Bluetooth: "On ESP32 use built-in BluetoothSerial instead of an HC-05." An ESP32 already contains a Bluetooth Classic radio; buying an HC-05 to add Bluetooth to a board that already has it is a wasted Rs.240. The same logic applies harder to ESP-NOW, since it isn't a separate radio at all — it rides on the WiFi hardware every ESP32 and ESP8266 already has. The NRF24L01 is the one case where a separate module is genuinely necessary on any board, ESP32 included, because no common microcontroller ships with a built-in 2.4GHz proprietary radio matching this chip.
Why is the NRF24L01's range 10x the HC-05's?
Different radio design entirely, not a manufacturing quality gap. Our record states the NRF24L01 reaches roughly 100m open-air; our HC-05 record states up to 10m. The NRF24L01 is a dedicated low-level RF transceiver whose entire job is maximising range and data rate for a simple point-to-point link, while Bluetooth Classic (what the HC-05 implements) was designed around lower power draw and phone compatibility, with range as a secondary concern. Neither number is wrong for its part; they're optimised for different things.
What's the #1 cause of NRF24L01 dropouts?
Insufficient or noisy 3.3V power, and our record says so in exactly those words: "insufficient/noisy 3.3V power is the #1 cause of dropout reports." The module's steady active current is only about 12mA, but our record's constraints list a peak of up to 115mA during transmit bursts — nearly ten times higher, and exactly the kind of spike a shared onboard 3.3V regulator (the same one powering your Arduino's logic) often can't supply cleanly. The fix our own record recommends directly is pairing it with the 3.3V Adapter Board for the 24L01, which adds local regulation and filtering right at the module rather than relying on the host board's regulator to absorb the spike.
Can either module talk to more than one device at once?
Differently, and neither does it for free. The HC-05's own name carries "Master/Slave" because Bluetooth Classic pairs one device to one other device at a time — our record's typical uses list "Bluetooth-controlled robots" and similar one-to-one links, and multi-device setups mean juggling separate pairings, not a genuine broadcast. The NRF24L01 is built closer to true multipoint: the RF24 library it uses supports multiple "pipes," letting one node listen to several others, and community mesh libraries build multi-hop networks on top of that same chip. If your project needs one controller talking to several remote nodes, the NRF24L01's architecture fits that shape far better than pairing multiple HC-05s ever could.
What should you know before wiring either module up for real?
Two separate traps, one per part, both named directly in their own records. The HC-05's AT command mode — where you configure its name, baud rate or pairing PIN — "can be tricky," in our record's own words, because the KEY/EN pin must be held HIGH before power is applied, not after; get the sequence backwards and the module ignores every AT command while looking otherwise powered and connected. The NRF24L01 has a different, purely electrical trap: our record notes "SPI timing sensitive; long wires cause communication failures," so a breadboard jumper wire run longer than a few centimetres is a common, invisible cause of a module that seemed to work on the bench and then stopped the moment it moved into an enclosure. Neither failure announces itself with a clear error — both just look like a dead radio.
How does each one wire up?
The HC-05 is the simpler wire job: just RX and TX on a UART (via SoftwareSerial on an Uno, since its RX pin is 5V tolerant but its own TX only outputs 3.3V and needs dividing down before reaching a 5V RX pin). The NRF24L01 is SPI — MOSI, MISO, SCK, CS and an additional CE pin, five signal wires against the HC-05's two — but that's also an advantage if your project already runs other SPI devices, since the bus lines can be shared and only CS/CE need to be unique per device.
Which wireless option should you actually buy?
If both ends of your link are ESP32 or ESP8266 boards, buy neither module — use ESP-NOW, built in. If you need to reach a phone, laptop, or any generic Bluetooth device and your host has no built-in radio, the HC-05 Bluetooth Module (Rs.240). If you're linking two of your own boards (Arduino, ESP32, or otherwise) over the longest range for the least money, the NRF24L01 Transceiver (Rs.85) — and if it's going on a 5V board, add the 3.3V Adapter Board (Rs.42) to avoid the power-related dropouts covered above. All available cash on delivery across India.
What should you read next?
Comparing this against a longer-range option? Our LoRa vs WiFi comparison covers what happens when 100m still isn't far enough, and our BLE vs Bluetooth Classic guide goes deeper on the HC-05's own Bluetooth trade-offs.
Not sure which wireless link your project needs? Open Soldr, describe both ends of the link and the range you need, and it will pick the option and the wiring.
Frequently asked questions
NRF24L01, HC-05 ya ESP-NOW - kaunsa wireless option lein?
Agar dono taraf ESP32 board hai, toh kuch bhi khareedne ki zaroorat nahi - ESP-NOW use karein, yeh built-in hota hai. Agar phone ya laptop se connect karna hai, HC-05 (Rs.240) lein. Agar apne hi do boards ke beech sabse lambi range aur kam paise mein link chahiye, NRF24L01 (Rs.85) lein - 5V board par lagate waqt 3.3V Adapter Board (Rs.42) bhi lein.
Do I need to buy anything for ESP-NOW?
No, if both ends are ESP32 or ESP8266 boards. ESP-NOW is a protocol built into the WiFi radio these chips already have — there is no separate module to purchase, unlike the NRF24L01 or HC-05, which are both physical parts you add.
Why does my NRF24L01 keep dropping connections?
Almost always power. Our catalogue record states directly that "insufficient/noisy 3.3V power is the #1 cause of dropout reports." The module draws about 12mA at rest but spikes to roughly 115mA during a transmit burst, and a shared onboard 3.3V regulator often can't supply that spike cleanly. Our record recommends pairing it with a dedicated 3.3V adapter board to fix this.
Do I need an HC-05 if I already have an ESP32?
No. Our own HC-05 record states plainly: "On ESP32 use built-in BluetoothSerial instead of an HC-05." The ESP32 already contains a Bluetooth Classic radio, so an HC-05 module would be a redundant Rs.240 spent adding a capability the board already has.
What is the price of these wireless modules in India?
At Compoden, the NRF24L01 2.4GHz Transceiver Module is Rs.85, the HC-05 Bluetooth Module is Rs.240, and the 3.3V Adapter Board for the NRF24L01 is Rs.42. ESP-NOW has no separate cost since it runs on WiFi hardware already built into ESP32 and ESP8266 boards. All available with cash on delivery across India. Prices checked August 2026.