Misc42 Labs · 02 · v1 prototype · friends-alpha in progress
हर मोड़ पर साथ — rear cameras, live HUD, mesh comms, cross-horizon SOS.
Mukut (मुकुट) is a clip-on safety module for any ISI-certified helmet — dual rear cameras, live HUD, tri-radio mesh, cross-horizon SOS. v1 is being hand-built on perfboard and tested with about ten friends. Not on sale yet. No cloud, no subscription, no waiting on a launch event.
Prototype scope
A landing page that pretends a prototype is a launched product is just marketing fiction. Here is the real shape of the build, in plain words — so a friend who agrees to ride one knows what's clamped to their helmet.
Hard rule for v1: no custom PCB. Each subsystem is a dev board or break-out — RV1126 SOM, ESP32-S3 DevKit, SX1280 / SX1262 / BC127 / BM83 modules, sensor break-outs — wired on a perfboard inside a 3D-printed shell. The integrated PCB ships in v1.5 only after friends-alpha feedback.
v1 isn't being sold. The first ten units go to riders we already know — local routes, real monsoon, real long-haul. Their feedback decides what gets refactored before a wider release. If you're reading this and want in, the friends list link goes to a placeholder address until the brand domain is locked.
WPC ETA, BIS CRS, AIS-010 EMC — all deferred to v1.5. v1 prototypes operate within India SRD self-declaration limits (SX1280 ≤ +20 dBm, SX1262 on the 865.5 MHz band). Helmet itself remains the rider's own ISI-certified shell; we never touch its certification.
Spotify and phone-call audio (A2DP + HFP) are routed through a separate BT-audio chip — a BC127 or BM83 dev module on the same perfboard, mixed into the helmet speakers alongside the mesh-voice channel. v1.5 folds that chip onto the integrated PCB. Mesh voice ducks when an HFP call connects.
Why this exists
01 · Rear blind spot
Live dithered rear-cam feed in the corner of your vision. Motion-zone alerts when something enters either blind spot. No app, no glance away from the road.
02 · Group ride awareness
ESP-NOW LR for close-pack, SX1280 FLRC when the group spreads, automatic failover. No SIM, no internet, no Cardo subscription.
03 · SOS that reaches
SX1262 on India's 865.5 MHz SRD band broadcasts your location to any helmet on the network, regardless of cell coverage. Manual trigger from the handlebar; auto-trigger via IMU in v2.
04 · Clip onto your helmet
Magnetic base + 3M VHB receiver. Universal across Vega, Studds, Axxis, Steelbird. No BIS helmet recertification needed — your helmet stays your helmet.
How it works
A Rockchip RV1126 + ESP32-S3 pair runs vision, audio, radio, and power orchestration. A BC127 / BM83 sits beside them for phone-side BT audio. Everything is local — the helmet doesn't need your phone or the internet to do its safety job.
01 · Vision
2× SC3336 sensors with sub-microsecond FSIN genlock. RV1126 ISP dewarps both, taps the rear camera direct to a Sharp LS013B7DH06 Memory LCD HUD at 30 fps, and stitches a panorama to microSD at 15 fps in the background. Floyd–Steinberg dither makes black-and-white legible in daylight.
02 · Audio
2× INMP441 in a Cardo-pattern endfire array feed ESP-AFE (AEC + BSS + NS + VAD), encoded Opus 16 kbps over the active radio. A BC127 / BM83 dev module handles phone A2DP music + HFP calls, mixed into the helmet speakers. Mesh voice ducks when an HFP call lands. p95 capture-to-air ship gate: ≤ 120 ms.
03 · Radios
Three radios, one mesh. Auto-failover when ESP-NOW RSSI drops below −95 dBm. SOS broadcasts on SX1262 concurrent with whatever voice channel is active. India SRD compliant: SX1280 +20 dBm conducted, SX1262 on the 865.5 MHz license-exempt band.
04 · Power
Magnetic POGO contacts for ingress safety — no USB-C port on the helmet. Internal 1500 mAh runs for two hours; bring any USB-PD source via the included adapter for longer rides. v1 has no branded battery SKU — the rider uses a power bank they already own.
Will it fit yours?
Interactive 3D preview of how Mukut's modular components clip onto a few popular full-face helmets. Don't see yours? Tell us and we'll add it to the closed-alpha list.
Specs at a glance
No marketing maximums. These are the part numbers and numbers we bench against on the v1 prototype; if a row slips, we tell you.
http://192.168.4.1 for video + dashboard, no SIM neededBill of materials · Cart A
v1 is hand-assembled from off-the-shelf dev modules on perfboard — zero PCB spin until the closed alpha validates the architecture. Below is the retail BoM as we'd click "buy" today, with vendor links and indicative INR pricing. The deeper engineering rationale — counterfeit guards, GPIO conflict math, antenna-gain rules, lead-time analysis — lives in the private engineering repo.
The detailed BoM is shared with the closed-alpha cohort.
Vendor links, INR pricing, and the row-by-row engineering notes are for the ~10-friend ride-test group. Have the password? Enter it below.
Wrong password. Try again.
Try the dashboard
The production dashboard runs locally off the helmet's own WiFi AP — no SIM, no data plan, no cloud. For everyone who doesn't have a unit in their hands yet, the same webapp is hosted here in demo mode with stubbed telemetry so you can walk through the rider UI.
Each Mukut module hosts its own 2.4 GHz WiFi access point on the ESP32-S3. Power the helmet on, your phone joins the SSID, and the dashboard becomes reachable at a fixed local address — same idea as a router admin page, but for a helmet.
http://192.168.4.1/
Android riders get the native app from the Play Store internal-test track. iPhone riders point Safari at the same address — the helmet hands back the dashboard as a static webapp. No App Store dance required for v1.
Once a unit is in your hands during friends-alpha, the dashboard is one WiFi-join away. Until then, the source lives on GitHub if you want to read what it does — or use the demo preview link above to walk through the UI right now.
Roadmap
v1 friends-alpha · not on sale
If you'd ride a hand-built prototype with us, drop a line.