Qwerty layout split 3x5 keyboard with 3 thumb keys each

split_3x5_3t_KeycodeMapping.json

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+{
+  "hardwareKeycodeMapping": [
+    0,   1,  2,  3,  4,        5,  6,  7,  8,  9,
+    10, 11, 12, 13, 14,       15, 16, 17, 18, 19,
+    20, 21, 22, 23, 24,       25, 26, 27, 28, 29,
+              30, 31, 32,   33, 34, 35
+],
+  "displayMapping": {
+    "30": "⇧",
+    "34": "␣",
+    "35": "⇮"
+  }
+}

split_3x5_3t_KeycodesToStrings.json

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+{
+    "0":["q", "Q", "!", "`"],
+    "1":["w", "W", "@", "€"],
+    "2":["e", "E", "#", "£"],
+    "3":["r", "R", "$", "¥"],
+    "4":["t", "T", "%", "¢"],
+    "5":["y", "Y", "^", "~"],
+    "6":["u", "U", "&", "_"],
+    "7":["i", "I", "*", "+"],
+    "8":["o", "O", "(", "-"],
+    "9":["p", "P", ")", "="],
+    "10":["a", "A", "1", ""],
+    "11":["s", "S", "2", ""],
+    "12":["d", "D", "3", ""],
+    "13":["f", "F", "4", ""],
+    "14":["g", "G", "5", ""],
+    "15":["h", "H", "6", "←"],
+    "16":["j", "J", "7", "↓"],
+    "17":["k", "K", "8", "↑"],
+    "18":["l", "L", "9", "→"],
+    "19":[";", ":", "0", ""],
+    "20":["z", "Z", "|", ""],
+    "21":["x", "X", "'", ""],
+    "22":["c", "C", "\"", ""],
+    "23":["v", "V", "⇥", "⇥"],
+    "24":["b", "B", "Esc", "Esc"],
+    "25":["n", "N", "{", ""],
+    "26":["m", "M", "}", ""],
+    "27":[",", "<", "[", ""],
+    "28":[".", ">", "]", ""],
+    "29":["/", "?" , "\\", ""],
+    "30":"left shift",
+    "31":"⌫",
+    "32":"⌦",
+    "33":"↩",
+    "34":"space",
+    "35":"altGr"
+}

split_3x5_3t_Layout.tsv

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+x	y	kind
+0	0.5	1x1
+1	0.2	1x1
+2	0	1x1
+3	0.2	1x1
+4	0.3	1x1
+9	0.3	1x1
+10	0.2	1x1
+11	0	1x1
+12	0.2	1x1
+13	0.5	1x1
+0	1.5	1x1
+1	1.2	1x1
+2	1	1x1
+3	1.2	1x1
+4	1.3	1x1
+9	1.3	1x1
+10	1.2	1x1
+11	1	1x1
+12	1.2	1x1
+13	1.5	1x1
+0	2.5	1x1
+1	2.2	1x1
+2	2	1x1
+3	2.2	1x1
+4	2.3	1x1
+9	2.3	1x1
+10	2.2	1x1
+11	2	1x1
+12	2.2	1x1
+13	2.5	1x1
+2.5	3.2	1x1
+3.5	3.3	1x1
+4.5	3.3	1x1.5
+8.5	3.3	1x1.5
+9.5	3.3	1x1
+10.5	3.2	1x1