Might be easier to do so with the (currently undocumented) Segmented Switch…
EDIT - Fixed, tested and and reposted this example:
BLYNK_WRITE(V18) { // Segmented Switch set to 3 buttons
switch (param.asInt()) {
case 1: // Full Sun
Blynk.virtualWrite(V19, "Full Sun");
break;
case 2: // Partial sun & cloud
Blynk.virtualWrite(V19, "Sun & Cloud");
break;
case 3: // Overcast
Blynk.virtualWrite(V19, "Overcast");
break;
}
}
You will need to reevaluate your coding methods when using an IoT based system like Blynk…