func ClientTestReadCoils(t *testing.T, client modbus.Client) {
// Read discrete outputs 20-38:
address := uint16(0x0013)
quantity := uint16(0x0013)
results, err := client.ReadCoils(address, quantity)
if err != nil {
t.Fatal(err)
}
AssertEquals(t, 3, len(results))
}
