Legacy edition, no longer supported: SharpShot Vision units shipped before 2026-10 (School and WRO editions) are no longer supported; their guides and examples stay here for reference. To upgrade to the current SharpShot Vision, contact the distributor you bought it from and send it back: the firmware update is free, and the buyer pays shipping both ways.

Looking for the current SharpShot Vision? →Legacy overview

This page has moved into the new guide: SharpShot Vision › micro:bit › MakeCode

Vision Sensor (School Edition) × micro:bit (MakeCode extension)

Back to Vision Sensor (School Edition)

The universal I2C edition of the Vision Sensor (School Edition) works with BBC micro:bit V1 / V2 through the MakeCode extension pxt-mbc-sensors v2 (which speaks MBC I2C protocol v2). Installation and hardware notes (3.3 V, power): micro:bit overview.

SPIKEEV3Arduino I2CmBlockMATRIXmicro:bit

Important

Extension v2 is not yet verified on hardware; block names follow the published release: https://github.com/contactmbcrobot/pxt-mbc-sensors

Wiring

Vision Sensor (School Edition) × micro:bit
Sensor micro:bit
SDA（RX） P20
SCL（TX） P19
VCC must use external 5 V (share GND with the micro:bit)
GND GND

Reporter blocks

Block Returns Id Meaning
camera colour [hue] -1~100 01 hue of sample point S1, 0100 (hue ring 0240 scaled); −1 = black/white/grey (saturation < 10); 0 when S1 is not set
camera colour [saturation] 0~100 02 saturation of sample point S1, 0~100
camera colour [brightness] 0~100 03 brightness (HSV value) of sample point S1, 0~100
camera motion 0~100 04 whole-frame motion 0~100 (more change = larger)
camera blob [X] 0~100 05 blob centre X 0~100, left = 0; 0 when not found
camera blob [Y] 0~75 06 blob centre Y 0~75, bottom = 0, top = 75; 0 when not found
camera blob [width] 0~100 07 blob width W 0~100; 0 = not found
camera blob [height] 0~75 08 blob height H 0~75; 0 when not found
camera blob [area] 0~7500 09 W×H (0~7500); 0 when not found
camera blob is found 0~1 0A 1 = a blob of the target colour is in view (W > 0), 0 = none

More blocks (yes / no, events)

Block Related value
camera colour is black / white / grey 01
on camera blob [found] 0A

Status

bit Name Meaning
b0 ready (ready) always 1 (values freeze while the camera menu is open)
b1 blob found (found) same as value 0A

JavaScript

if (!(mbc.waitReady(0x4C, 3000))) {
    basic.showIcon(IconNames.No)   // nothing answers: check wiring and power
}
basic.forever(function () {
    basic.showNumber(mbc.camColor(MbcCamColor.Hue))   // hue
    basic.pause(100)
})

Sources and assumptions

Generated by _build/gen-reference.mjs from _build/protocol/cam_school.json (single source of truth, transcribed from the 2026-10-21 protocol decisions).

  • hw0 = 1（共識 #6：神攝手 1 = 學校版）；model 字串 CAMSCH 照任務指定（韌體原本沒有型號欄位）。
  • D4：I2C 0x4C 用 SDA = IO3、SCL = IO1（沿 PS4 Wire.setPins 慣例），與 EV3／SPIKE 串口模式二選一編譯；ESP32 從機不能時脈延展，onReceive 預載 32 B；頁面標「硬體已確認，上機待測」。mBlock 用同一組腳 Serial.begin(38400, SERIAL_8N1, 3, 1)。
  • EV3 六個模式全部鎖住照盤點（模式 3／5 的 −1 已在 #65 修成符號延伸）；EV3 定案最後的 golden 備註把 cam_school 列進「模式 5 改 ID」是筆誤（定案表本身寫「—」；模式 5 仍是 [色相, 飽和]），所以 ev3IdMode = null。
  • SPIKE 模式 9 鎖住，只有 byte 89（v[4]）從 0 改成面積 W×H；模式 6 改 [X, Y, 面積]；模式 8 = [0x4C | 1<<8, 2, 韌體版, 更新序號]；模式 14 維持 0。
  • SPIKE 模式 0 的「面積」是 map(像素面積 05000 → 0100)，跟值表 09 的 W×H 不同，鎖住不改（照盤點）。
  • mVision：N = 10（idx 0~9），色相 −1 送 255；每 20 ms 一包（B-6）；不做 0x22（hosts.matrix = false）。
  • 0A 有找到色塊 = W > 0（盤點：W 0 = 沒找到）；F3 b1 同這個值。
  • 值 05~08 的「沒找到 = 0」照盤點 §0；色塊 Y 下 = 0、上 = 75 照盤點（map(bestY,120,0,0,75)）。
  • 沒有寫入命令（韌體無法從程式改目標顏色／補光燈）。
  • The extension reads Int16LE and pauses 2 ms after writing the id (D5); with no sensor answering, reporters return 0 and yes / no blocks return false.
Email for a quoteBuying Guide