Hi, I added a line what I like to have is to sign the distance to U i, i = 0, 1, 3, how should I do it please? Thanks Adam #include <NewPing.h> #define SONAR_NUM 3 // Number of sensors. #define MAX_DISTANCE 200 // Maximum distance (in cm) to ping. NewPing sonar[SONAR_NUM] = { // Sensor …

You cannot invent variable names at runtime but you could use an array U[3] and hold values in the array addresses of U[0], U[1] and U[2]

'Ui' was not declared in this scope

shanren August 28, 2021, 6:53pm 14

Thanks.
uint8_t U = 0; changed into: uint8_t U[3] = {0}; works.

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