RadioMaster Zorro ELRS + RP1: specs
Hand-held 2.4 GHz radio transmitter running EdgeTX with an internal ExpressLRS 2.4 GHz module, sold with an RP1 receiver.
Specs
| Spec | Value | Source |
|---|---|---|
| Operating frequency | 2.400 GHz to 2.480 GHz | source Specifications (p.4) |
| Internal RF options | CC2500 multi-protocol / 4-in-1 multi-protocol / ELRS 2.4GHz (this page: ELRS version) | source Specifications (p.4) |
| ELRS RF output | 10 mW to 250 mW; 100 mW at 500 Hz update rate recommended | source Model selection and protocol selection (ELRS version) (p.3) |
| Operational current | 400 mA for ELRS at 250 mW (160 mA for the CC2500 and 4-in-1 versions) | source Specifications (p.4) |
| Operational voltage | 6.6-8.4 V DC | source Specifications (p.4) |
| Battery | 2 x 18350 (not included); built-in USB-C charging for 2x 3.7 V Lithium-Ion only, 4.2 V maximum per cell | source Specifications (p.4); Power Requirements (p.2) |
| Control channels | Maximum 16, receiver dependent | source Specifications (p.4) |
| Operating system | EdgeTX; update by USB or SD card | source Specifications (p.4) |
| Module bay | Nano size (compatible with Nano Crossfire, Nano Tracer and RadioMaster nano-size modules) | source Specifications (p.4) |
| Size and weight | 170 x 159 x 108 mm; 350 g | source Specifications (p.4) |
| Included receiver (RP1) | 5V input, CRSF protocol, 2400 MHz to 2483 MHz | source Specifications (p.1) |
Power
| Value | Source | |
|---|---|---|
| Supply | 6.6-8.4 V DC from 2 x 18350 Lithium-Ion cells | source Specifications (p.4) |
| Current | 400 mA for ELRS at 250 mW | source Specifications (p.4) |
Pinout
We don't publish a pin table for this part: no official source we could verify gives one. Check the labels printed on your module, and see the notes below.
Build with it
Project ideas for the RadioMaster Zorro ELRS + RP1. Each link opens Soldr with the prompt filled in; Soldr assigns the pins, checks power and shows how to wire every part.
- Channel viewer: The transmitter's ELRS module and the RP1 receiver both use ExpressLRS 2.4 GHz. Power the receiver from 5 V; the manual gives no serial signal voltage, so measure the TX pad before joining it to a 3.3 V ESP32 pin. Bench only, no motors or propellers connected. Learning project.
- Stick input recorder: The Pi header supplies the receiver's 5 V. Measure the receiver TX pad voltage before connecting it to the Pi's 3.3 V RX pin. Bench only, no motors or propellers connected. Learning project.
- USB serial monitor: Powered over USB, which gives the receiver its 5 V. Check the TX pad voltage before connecting it to a 3.3 V pin. Bench only, no motors or propellers connected. Learning project.
Common mistakes
- Charging the wrong cells. The built-in charger is for 2x 3.7 V Lithium-Ion cells only; never charge 3.6 V LiFe or 3.6 V 18350 packs with it (source: link, Power Requirements p.2).
- Running at full ELRS output all the time. The maker recommends 100 mW at a 500 Hz update rate, since higher output and rates may cut battery life and add heat (source: link, ELRS version section p.3).
- Working on a model with the propellers fitted. The maker says to disconnect power to the model and remove propellers during assembly or maintenance (source: link, Safety Information p.1).
Not covered by the official source
- The sheet is a quick start guide; it gives no transmit current figure for the ELRS module other than the 400 mA operational figure.
- The guide refers to 'Boxer ELRS units' in the ELRS section, apparently copied from the Boxer guide; the 10 mW to 250 mW and 100 mW figures are used as written for the ELRS version.