If no "B" parameter given, get 1 byte
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@ -5038,7 +5038,7 @@ inline void gcode_M121() { endstops.enable_globally(false); }
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*/
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inline void gcode_M156() {
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uint8_t addr = code_seen('A') ? code_value_short() : 0;
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int bytes = code_seen('B') ? code_value_short() : 0;
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int bytes = code_seen('B') ? code_value_short() : 1;
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if (addr && bytes > 0 && bytes <= 32) {
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i2c.address(addr);
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