{ "format": "evn-blocks", "version": 3, "title": "Gesture sensor: every block", "needs": "the gesture sensor on I2C port 1 (nothing over it at the start), a hand or a black card, a white sheet, and something coloured", "description": "Every gesture sensor block once: how close your hand is, the colour the sensor sees, waiting for a swipe, and checking for one without waiting. The directions are the way the hand moved with the module's label upright, after a black / white colour calibration the board keeps for the port.", "workspace": { "blocks": { "languageVersion": 0, "blocks": [ { "type": "evn_setup_start", "x": 30, "y": 30, "next": { "block": { "type": "evn_gesture_setup", "fields": { "PORT": "1" } } } }, { "type": "evn_program_start", "x": 30, "y": 115, "next": { "block": { "type": "evn_comment", "fields": { "TEXT": "calibrate the colour once (the board keeps it for this port). The LED is infrared, so the colour sees the room light: black = the sensor covered completely, white = a white sheet in the room light. Swipes off first: gesture mode freezes the colour and the calibration refuses it" }, "next": { "block": { "type": "evn_python", "fields": { "CODE": "gesture_sensor_1.engines(gesture=False)" }, "next": { "block": { "type": "text_print", "inputs": { "TEXT": { "shadow": { "type": "text", "fields": { "TEXT": "cover the sensor completely (a hand or a black card on it)" } } } }, "next": { "block": { "type": "evn_wait", "inputs": { "TIME": { "shadow": { "type": "math_number", "fields": { "NUM": 3000 } } } }, "next": { "block": { "type": "evn_gesture_calibrate", "fields": { "PORT": "1", "WHAT": "black" }, "next": { "block": { "type": "text_print", "inputs": { "TEXT": { "shadow": { "type": "text", "fields": { "TEXT": "hold a white sheet a few cm above the sensor, in the room light" } } } }, "next": { "block": { "type": "evn_wait", "inputs": { "TIME": { "shadow": { "type": "math_number", "fields": { "NUM": 3000 } } } }, "next": { "block": { "type": "evn_gesture_calibrate", "fields": { "PORT": "1", "WHAT": "white" }, "next": { "block": { "type": "evn_python", "fields": { "CODE": "gesture_sensor_1.engines(gesture=True)" }, "next": { "block": { "type": "evn_comment", "fields": { "TEXT": "how close: 0 (nothing there) to 255 (very close). A hand held still close by freezes the number until it moves away (the sensor is then watching for a swipe)" }, "next": { "block": { "type": "controls_repeat_ext", "inputs": { "TIMES": { "shadow": { "type": "math_number", "fields": { "NUM": 30 } } }, "DO": { "block": { "type": "text_print", "inputs": { "TEXT": { "block": { "type": "text_join", "inputs": { "ADD0": { "shadow": { "type": "text", "fields": { "TEXT": "proximity " } } }, "ADD1": { "block": { "type": "evn_gesture_proximity", "fields": { "PORT": "1" } } } } } } }, "next": { "block": { "type": "evn_wait", "inputs": { "TIME": { "shadow": { "type": "math_number", "fields": { "NUM": 100 } } } } } } } } }, "next": { "block": { "type": "evn_comment", "fields": { "TEXT": "the colour it sees: hold something coloured close above it. Swipes off meanwhile: with them on, something held close freezes the colour and can stop the program with an error" }, "next": { "block": { "type": "evn_python", "fields": { "CODE": "gesture_sensor_1.engines(gesture=False)" }, "next": { "block": { "type": "controls_repeat_ext", "inputs": { "TIMES": { "shadow": { "type": "math_number", "fields": { "NUM": 10 } } }, "DO": { "block": { "type": "text_print", "inputs": { "TEXT": { "block": { "type": "evn_gesture_color", "fields": { "PORT": "1" } } } }, "next": { "block": { "type": "evn_wait", "inputs": { "TIME": { "shadow": { "type": "math_number", "fields": { "NUM": 300 } } } } } } } } }, "next": { "block": { "type": "text_print", "inputs": { "TEXT": { "shadow": { "type": "text", "fields": { "TEXT": "take it away" } } } }, "next": { "block": { "type": "evn_wait", "inputs": { "TIME": { "shadow": { "type": "math_number", "fields": { "NUM": 2000 } } } }, "next": { "block": { "type": "evn_comment", "fields": { "TEXT": "swipes back on, with nothing over the sensor" }, "next": { "block": { "type": "evn_python", "fields": { "CODE": "gesture_sensor_1.engines(gesture=True)" }, "next": { "block": { "type": "evn_comment", "fields": { "TEXT": "wait for three swipes (None when none comes within 5 s)" }, "next": { "block": { "type": "controls_repeat_ext", "inputs": { "TIMES": { "shadow": { "type": "math_number", "fields": { "NUM": 3 } } }, "DO": { "block": { "type": "text_print", "inputs": { "TEXT": { "block": { "type": "evn_gesture_wait", "fields": { "PORT": "1" }, "inputs": { "TIMEOUT": { "shadow": { "type": "math_number", "fields": { "NUM": 5000 } } } } } } } } } }, "next": { "block": { "type": "evn_comment", "fields": { "TEXT": "check for a swipe without waiting, for 10 s: each swipe is reported once, None in between" }, "next": { "block": { "type": "controls_repeat_ext", "inputs": { "TIMES": { "shadow": { "type": "math_number", "fields": { "NUM": 200 } } }, "DO": { "block": { "type": "variables_set", "fields": { "VAR": { "id": "v_swipe" } }, "inputs": { "VALUE": { "block": { "type": "evn_gesture_gesture", "fields": { "PORT": "1" } } } }, "next": { "block": { "type": "controls_if", "inputs": { "IF0": { "block": { "type": "logic_compare", "fields": { "OP": "NEQ" }, "inputs": { "A": { "block": { "type": "variables_get", "fields": { "VAR": { "id": "v_swipe" } } } }, "B": { "block": { "type": "logic_null" } } } } }, "DO0": { "block": { "type": "text_print", "inputs": { "TEXT": { "block": { "type": "variables_get", "fields": { "VAR": { "id": "v_swipe" } } } } } } } }, "next": { "block": { "type": "evn_wait", "inputs": { "TIME": { "shadow": { "type": "math_number", "fields": { "NUM": 50 } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } } ] }, "variables": [ { "name": "swipe", "id": "v_swipe" } ] } }